DR
Uploaded byDivyanshu Rasauria
PPSX, PPTX1,454 views

Matlab basic and image

MATLAB is an integrated technical computing environment for numeric computation, advanced graphics and visualization, and programming. It allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation and execution of scripts and functions. The MATLAB desktop provides the command window, editor, workspace and other tools. Key features include support for multidimensional arrays, mathematical functions, plotting, scripting and conditional/loop control statements.

Embed presentation

Download as PPSX, PPTX
MathWorks® MATLAB® R2012a (7.14)
MATLAB Introducing MATLAB – Language of technical computing 2 Is an integrated technical computing environment that combines numeric computation, advanced graphics and visualization, and a high-level programming language. The MathWorks, Inc. High-level language of technical computing Development environment for engineers, scientists Interactive tools for design, problem solving Mathematical function libraries Graphics and data visualization tools Custom GUIs External Interfaces: C, C++, Fortran, Java, COM, Excel, .NET
MATLAB product family Toolboxes: Collections of specialized Functions Graphics 2D Graphics 3D Graphics Color & Lighting Animation Image, Audio & Video Computations Linear Algebra Data Analysis Polynomials Interpolations Solutions of ODE External Interfaces C C++ JAVA .net Micorosoft Excel Parallel Computing Math, Statistics, and Optimization Control System Design and Analysis Signal Processing and Communications Image Processing and Computer Vision Test and Measurement Built-in Functions User-written Functions MATLAB Computational Finance Computational Biology Code Generation and Verification Application Deployment Database Connectivity and Reporting MATLAB Programming Language Parallel Computing Toolbox MATLAB Distributed Computing Server Parallel Computing Symbolic Math Toolbox Partial Differential Equation Toolbox Statistics Toolbox Curve Fitting Toolbox Optimization Toolbox Global Optimization Toolbox Neural Network Toolbox Model-Based Calibration Toolbox Math, Statistics, and Optimization Control System Toolbox System Identification Toolbox Fuzzy Logic Toolbox Robust Control Toolbox Model Predictive Control Toolbox Aerospace Toolbox Control System Design and Analysis Signal Processing Toolbox DSP System Toolbox Communications System Toolbox Wavelet Toolbox Fixed-Point Toolbox RF Toolbox Phased Array System Toolbox Signal Processing and Communications Image Processing Toolbox Computer Vision System Toolbox Image Acquisition Toolbox Mapping Toolbox Image Processing and Computer Vision Data Acquisition Toolbox Instrument Control Toolbox Image Acquisition Toolbox OPC Toolbox Vehicle Network ToolboxTest and Measurement Financial Toolbox Econometrics Toolbox Datafeed Toolbox Database Toolbox Computational FinanceSpreadsheet Link EX (for Microsoft Excel) Fixed-Income Toolbox Financial Derivatives Toolbox Bioinformatics Toolbox SimBiology Computational Biology MATLAB Coder HDL Coder HDL Verifier Filter Design HDL Coder Code Generation and Verification MATLAB Compiler MATLAB Builder NE (for Microsoft .NET Framework) MATLAB Builder JA (for Java language) MATLAB Builder EX (for Microsoft Excel) Spreadsheet Link EX (for Microsoft Excel) Application Deployment Database Toolbox MATLAB Report Generator Database Connectivity and Reporting Introducing MATLAB – Language of technical computing 3
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB 4
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB 5 Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Conditional control statements Loop control statements Functions – creating & executing a function file MATLAB for Image Processing
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 6 Conditional control statements Loop control statements
The main window characterized by the MATLAB command prompt (>>) Command Window This is where you write, edit, create, and save your own script or programs in files called m-files. Editor Window This is where all your files from the current directory are listed. Current Directory All commands typed on MATLAB prompt in the command window get recorded, even across multiple session in this window. Command History This subwindow lists all variables that you have generated so far along with there type and size. Workspace MATLAB - Desktop Minimal MATLAB 7
MATLAB - Desktop The main window characterized by the MATLAB command prompt (>>) Help Window Minimal MATLAB 8
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 9 Conditional control statements Loop control statements
Basic Data and Variables Computing with MATLAB Class Variable SizeValue Minimal MATLAB 10
Basic Data and Variables Computing with MATLAB Multidimensional Array [full or sparse] Scalar  logical ab char { } cell struct function handle (@)numeric int8, uint8, int16, unit16, int32, unit32, int64, unit64 single double Minimal MATLAB 11
Arithmetic Operator & Their Precedence Computing with MATLAB Operations Operators Examples Addition Subtraction Multiplication Right Division Left Division Exponentiation + − * / ^ >> 𝟓 + 𝟑 >> 𝟓 − 𝟑 >> 𝟓 ∗ 𝟑 >> 𝟓/𝟑 >> 𝟓𝟑 = 𝟑/𝟓 >> 𝟓^𝟑 (means 𝟓 𝟑 = 𝟏𝟐𝟓) Precedence Order Operators 1 2 3 4 Parentheses ( ). For nested parentheses, the innermost are executed first. Exponentiation, ^ Multiplication, *; Division, /, Addition, +; Subtraction, - help precedence Minimal MATLAB 12
Computing with MATLAB Mathematical Functions Trigonometry sind cosd tand cotd secd cscd Degree sin cos tan cot sec csc sinh cosh tanh coth sech csch asin acos atan acot asec acsc Basic Hyperbolic Inverse Radian Basic Exponential exp log log10 log2 sqrt Complex abs conj imag real angle Matrix det trace rank inv expm sqrtm Discrete Math factorial gcd lcm primes help <type function name> Minimal MATLAB 13
Predefined Variables and Keywords ans pi eps inf i,j NaN A variable that has the value of the last expression that was not assigned to a specific variable The number π. The smallest difference between two numbers. Equal to 2^(–52), which is approximately 2.2204e–016. Used for infinity. Defined as −1, which is: 0 + 1.0000i. Stands for Not-a-Number. Used when MATLAB cannot determine a valid numeric value. Example: 0/0. Predefined Variables break case catch classdef continue else elseif end for function global if otherwise parfor persistent return spmd switch try while Keywords iskeyword help <Predefined Variable Name> Computing with MATLAB Minimal MATLAB 14
Managing Variables clear clear x y z clear all who Clears the workspace, all variables are removed from the memory Clears only variables x, y, and z Clears all variables and functions from workspace Lists variables currently in the workspace Command Outcome Computing with MATLAB Minimal MATLAB 15
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 16 Conditional control statements Loop control statements
Overview Array 5 5 7 45 7 4 5 10 56 6 4 6 7 78 86 Scalar of 1 X 1 Row Vector of 1 X 3 Column vector of 3 X 1 One Dimensional Matrix of 3 X 3 5 10 56 85 23 6 4 6 23 2 7 78 86 53 6 5 14 12 10 56 6 10 504 4 6 89 0 Two Dimensional Matrix of 3 X 5 5 10 56 85 23 6 4 6 23 2 7 78 86 53 6 5 14 12 10 56 6 0 5 14 12 10 56 89 0 Three Dimensional Matrix of 3 X 5 Minimal MATLAB 17
Creation Array One Dimensional Array variable_name = [ type vector elements ] Minimal MATLAB 18 Two Dimensional Array variable_name = [1st row elements; 2nd row elements; 3rd row elements; ... ; last row elements]  from a known list of numbers  with constant spacing by specifying the first term, the spacing, and the last term Known lists of numbers
Array Minimal MATLAB 19 Creation Creating a vector with constant spacing by specifying the first term, the spacing, and the last term: variable_name = [m:q:n] or variable_name = m:q:n m = first term q = spacing n = last term : (colon operator)Constant spacing Creating a vector with linear (equal) spacing by specifying the first and last terms, and the number of terms: variable_name = linspace(xi, xf, n) xi = first element xf = Last element n = number of elements linspaceConstant spacing
Array Minimal MATLAB 20 Array Operators + Addition - Subtraction .* Element-by-element multiplication ./ Element-by-element division . Element-by-element left division .^ Element-by-element power ‘ Transpose Operations Operation 𝐴 = 1 3 4 2 𝐵 = 2 3 5 7 𝐶 = 𝐴.∗ 𝐵 = 2 9 20 14 𝐶 = 1 × 2 3 × 3 4 × 5 2 × 7
Data Manipulation Array Minimal MATLAB 21 Addressing - Extraction (Subset) Addressing an element(s) individually or in subgroups:  To redefine only some of the elements,  When specific elements are to be used in calculations,  When a subgroup of the elements is used to define a new variable.
Array Minimal MATLAB 22 Address vector >> ve = [35 46 78 23 5 14 81 3 55] ve = 35 46 78 23 5 14 81 3 55 1 2 3 4 5 6 7 8 9 position or index of element Data Manipulation
Array Minimal MATLAB 23 Address matrix ) (1,1) (1,2) (1,3) (1,4) (2,1) (2,2) (2,3) (2,4) (3,1) (3,2) (3,3) (3,4) 3 11 6 5 4 7 10 2 13 9 0 8 MAT = Data Manipulation
Array Minimal MATLAB 24 Addressing vector : (colon operator) Data Manipulation Addressing matrix : (colon operator) A(:,n) Refers to the elements in all the rows of column n of the matrix A. A(n,:) Refers to the elements in all the columns of row n of the matrix A. A(:,m:n) Refers to the elements in all the rows between columns m and n of the matrix A. A(m:n,:) Refers to the elements in all the columns between rows m and n of the matrix A. A(m:n,p:q) Refers to the elements in rows m through n and columns p through q of the matrix A.
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 25 Conditional control statements Loop control statements
Creation Plotting Minimal MATLAB 26 Example Damped Oscillation equation: 𝒚 = 𝒆−𝒂𝒕 𝐜𝐨𝐬 (𝒃𝒕)
Creation Plotting Minimal MATLAB 27 Example Damped Oscillation equation: 𝒚 = 𝒆−𝒂𝒕 𝐜𝐨𝐬 (𝒃𝒕) a = 0.1; b = 1; t = 0:0.1:20; y = exp(-a*t).*cos(b*t); plot(t,y) grid on; xlabel('Time in second'); ylabel('Response in mm'); title('Damped Oscillation'); legend('a = 0.1,b = 1)'); 1- 2- 3- 4- 5- 6- 7- 8- 9-
Creation Plotting Minimal MATLAB 28 Overview ylabel xlabel title legend
Graphing Plotting Minimal MATLAB 29 Plot function plot(x,y) where the variables x and y are vector and must be of same size i.e the number of elements should be equal. x=[1 2 3 5 7 7.5 8 10]; y=[2 6.5 7 7 5.5 4 6 8]; plot(x,y)
Graphing Plotting Minimal MATLAB 30 Plot function plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) Line specifiers are optional and can be used to define the style and color of the line and the type of markers (if markers are desired). Line specifiers solid (default) dashed dotted dash-dot Line Style Specifier - -- : -. red green blue cyan Line color Specifier r g b c magenta yellow black white Line color Specifier m y k w
Graphing Plotting Minimal MATLAB 31 Plot function plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) Line specifiers are optional and can be used to define the style and color of the line and the type of markers (if markers are desired). Line specifiers plus sign circle asterisk point cross triangle (pointed up) triangle (pointed down) Marker type Specifier + o * . × ^ v square diamond five pointed star six pointed star triangle (pointed left) triangle (pointed right) Marker type Specifier s d p h < >
Graphing Plotting Minimal MATLAB 32 Plot function plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) To specify the thickness of the line, the size of the marker, and the colors of the marker’s edge line and fill Property Name
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 33 Conditional control statements Loop control statements
Creation Script Minimal MATLAB 34 Overview Sequence of MATLAB statements in fileScript A script file is an external file that contains a sequence of MATLAB statements. Script files have a filename extension of .m.
Basics Script Minimal MATLAB 35 variable_name = input(‘prompt message’) Accepting input from user Displaying output to user disp(name of a variable) disp(‘text as string’) Saving script file Creating script file Executing script file
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 36 Conditional control statements Loop control statements
Creation Script Minimal MATLAB 37 Conditional Statement Conditional expression consisting of relational and/or logical operators. Operations Operators Less than Greater than Less than or equal to Greater than or equal to Equal to Not Equal to < > <= >= == ~= Relational Operators Operations Operators And Or Not && || ~ Logical Operators
Creation Script Minimal MATLAB 38 Example 𝑔 𝑡 = 0, 𝑡 < −2 −4 − 2𝑡, −2 < 𝑡 < 0 −4 − 3𝑡, 0 < 𝑡 < 4 16 − 2𝑡, 4 < 𝑡 < 8 0, 𝑡 > 8 Plot g1 g2 g3 t = linspace(-5,10); g1 = -4 - 2*t; g2 = -4 + 3*t; g3 = 16 - 2*t; g = g1.*(-2<t & t<=0)... + g2.*(0<t & t<=4)... + g3.*(4<t & t<=8); plot(t,g) 1- 2- 3- 4- 5- 6- 7- g1 g2 g3
if/elseif/else Statement Script Minimal MATLAB 39 if statement Statement Group 1 False True End Statement Group 2 if expression statements elseif expression statements else statements end
Creation Script Minimal MATLAB 40 Switch Statement False True Flowchart match case, k case end False case statement, k True switch switch_expression case case_expression statements case case_expression statements : otherwise statements end
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 41 Conditional control statements Loop control statements
Loop control statements Script Minimal MATLAB 42 for (Iterative Loop) while (Conditional Loop) continue, break for index = start:increment:end statements end while expression statements end
Agenda Introducing MATLAB – Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 43 Conditional control statements Loop control statements
Creation Function Minimal MATLAB 44 Overview SYSTEM [Mathematical model of Physical Phenomenon] (function file) Set of inputs Set of outputs 1 2 3 m 1 2 3 n [System] Electrical Networks Communication System Control System Thermodynamic System Computer system, etc [Input variables] current, voltage, power, energy, temperature, data [Output variables] current, voltage, power, energy, temperature, Processed data function [out1, out2, ...] = func_name(in1, in2, ...) declares the function func_name, and its inputs and outputs
Creation Function Minimal MATLAB 45 Example 𝐻 = 𝑦 𝑥 = 1 1 + (𝜔𝑅𝐶)2 Black BoxX Y function H = lp(R,C) w = logspace(-2,6); H = 1./sqrt(1 + (w*R*C).^2); semilogx(w,H) xlabel('Angular frquency, w (rad/s)'); ylabel('System Response'); title('Low-Pass frequency response'); 1- 2- 3- 4- 5- 6- Source: MATLAB An Introduction with Applications, Amos Gilat, 4e
Creation Function Minimal MATLAB 46 Example
Creation Function Minimal MATLAB 47 Example Black Box 𝑇 𝑇𝑑 𝑇 𝑤 𝐵𝑃 𝑅𝐻 𝑅𝐻 = 100 𝑒 𝑒𝑠 𝑇𝑑 = 243.5 ln( 𝑒 6.112 ) 17.67 − ln( 𝑒 6.112 ) 𝑇𝑑, dew point temperature °𝐶 𝑇, dry-bulb temperature °𝐶 𝑇 𝑤, wet-bulb temperature °𝐶 𝐵𝑃, barometric temperature in millibars 𝑅𝐻, relative humidity in % 𝑃𝑠 = 6.112 exp 17.67𝑇 𝑇 + 243.5 𝑃𝑤 = 6.112 exp 17.67𝑇 𝑤 𝑇 𝑤 + 243.5 𝑒 = 𝑒 𝑤 − 𝐵𝑃 𝑇 − 𝑇 𝑤 0.00066(1 + 0.00115𝑇 𝑤) Source: MATLAB An Introduction with Applications, Amos Gilat, 4e
Creation Function Minimal MATLAB 48 Example function [Td, RH] = DewptRhum(T,Tw,BP) es = 6.112*exp((17.67*T)/(T + 243.5)); ew = 6.112*exp((17.67*Tw)/(Tw + 243.5)); e = ew - BP*(T - Tw)*0.00066*(1 + 0.00115*Tw); RH = 100*(e/es); Td = (243.5*log(e/6.112))/(17.67 - log(e/6.112)); 1- 2- 3- 4- 5- 𝑇 = 25°𝐶, 𝑇 𝑤 = 19°𝐶, 𝐵𝑃 = 985 𝑚𝑖𝑙𝑙𝑖𝑏𝑎𝑟 Calculate 𝑻 𝒅 =? , 𝑹𝑯 =? 𝑇 = 36°𝐶, 𝑇 𝑤 = 31°𝐶, 𝐵𝑃 = 1020 𝑚𝑖𝑙𝑙𝑖𝑏𝑎𝑟
Creation Function Minimal MATLAB 48 Visualization and Graphics • plot(x,y),plot(x,sin(x)) – plot 1D function • figure, figure(k) – open a new figure • hold on, hold off – refreshing • axis([xmin xmax ymin ymax]) – change axes • title(‘figure titile’) – add title to figure • mesh(x_ax,y_ax,z_mat) – view surface • contour(z_mat) – view z as topo map • subplot(3,1,2) – locate several plots in figure
• MATLAB can import/export several image formats: – BMP (Microsoft Windows Bitmap) – GIF (Graphics Interchange Files) – HDF (Hierarchical Data Format) – JPEG (Joint Photographic Experts Group) – PCX (Paintbrush) – PNG (Portable Network Graphics) – TIFF (Tagged Image File Format) – XWD (X Window Dump) – raw-data and other types of image data • Typically switch images to double to perform any processing and convert back to unsigned integer • Data types in MATLAB – Double (64-bit double-precision floating point) – Single (32-bit single-precision floating point) – Int32 (32-bit signed integer) – Int16 (16-bit signed integer) – Int8 (8-bit signed integer) – Uint32 (32-bit unsigned integer) – Uint16 (16-bit unsigned integer) – Uint8 (8-bit unsigned integer) Images in MATLAB
• Binary images : {0,1} • Intensity images : [0,1] or uint8, double etc. • RGB images : m × n × 3 • Multidimensional images: m × n × p (p is the number of layers) Images in MATLAB
Image Import and Export • Read and write images in Matlab img = imread('apple.jpg'); dim = size(img); figure; imshow(img); imwrite(img, 'output.bmp', 'bmp'); • Alternatives to imshow imagesc(I) imtool(I) image(I)
Images and Matrices Column 1 to 256 Row1to256 o [0, 0] o [256, 256] How to build a matrix (or image)? Intensity Image: row = 256; col = 256; img = zeros(row, col); img(100:105, :) = 0.5; img(:, 100:105) = 1; figure; imshow(img);
Images and Matrices Binary Image: row = 256; col = 256; img = rand(row, col); img = round(img); figure; imshow(img); size(im)
Image Display • image - create and display image object • imagesc - scale and display as image • imshow - display image
THANKS DIVYANSHU RASAURIA divyanshurashouariya@yahoo.in

More Related Content

PDF
Simulink Stateflow workshop
byMATLABISRAEL
 
PPT
Brief Introduction to Matlab
byTariq kanher
 
PPT
Introduction to matlab
byTarun Gehlot
 
PPT
Matlab Introduction
byDaniel Moore
 
PPSX
Matrix Manipulation in Matlab
byMohamed Loey
 
PPTX
Multiplier control unit
bySatyamevjayte Haxor
 
PPTX
Machine Learning ppt
byStudent Conscious Club
 
PPTX
Artificial Intelligence Approaches
byJincy Nelson
 
Simulink Stateflow workshop
byMATLABISRAEL
 
Brief Introduction to Matlab
byTariq kanher
 
Introduction to matlab
byTarun Gehlot
 
Matlab Introduction
byDaniel Moore
 
Matrix Manipulation in Matlab
byMohamed Loey
 
Multiplier control unit
bySatyamevjayte Haxor
 
Machine Learning ppt
byStudent Conscious Club
 
Artificial Intelligence Approaches
byJincy Nelson
 

What's hot

PPTX
Summer training matlab
byArshit Rai
 
PPTX
Direct linking loaders
bySatyamevjayte Haxor
 
PPTX
Performance analysis(Time & Space Complexity)
byswapnac12
 
PPTX
Self-organizing map
byTarat Diloksawatdikul
 
PDF
Bit pair recoding
byBasit Ali
 
PPTX
Embedded c
byAmi Prakash
 
PPT
Micro programmed control
bySyed Zaid Irshad
 
PPT
Fuzzy relations
bynaugariya
 
PPTX
Job sequencing with deadline
byArafat Hossan
 
PDF
Linear regression
byMartinHogg9
 
DOCX
Behavioural modelling
byBenazir Fathima
 
PDF
ARM CORTEX M3 PPT
byGaurav Verma
 
PDF
Matlab introduction lecture 1
byMohamed Awni
 
PDF
MiL Testing of Highly Configurable Continuous Controllers
byLionel Briand
 
PDF
Fundamentals of Genetic Algorithms (Soft Computing)
byAmit Kumar Rathi
 
DOCX
Uml Common Mechanism
bySatyamevjayte Haxor
 
PPT
2.2 decision tree
byKrish_ver2
 
PPTX
Machine Learning-Linear regression
bykishanthkumaar
 
PDF
Unit II Study of Onchip Peripherals
byDr. Pankaj Zope
 
PPT
Embedded System Basics
byDr M Muruganandam Masilamani
 
Summer training matlab
byArshit Rai
 
Direct linking loaders
bySatyamevjayte Haxor
 
Performance analysis(Time & Space Complexity)
byswapnac12
 
Self-organizing map
byTarat Diloksawatdikul
 
Bit pair recoding
byBasit Ali
 
Embedded c
byAmi Prakash
 
Micro programmed control
bySyed Zaid Irshad
 
Fuzzy relations
bynaugariya
 
Job sequencing with deadline
byArafat Hossan
 
Linear regression
byMartinHogg9
 
Behavioural modelling
byBenazir Fathima
 
ARM CORTEX M3 PPT
byGaurav Verma
 
Matlab introduction lecture 1
byMohamed Awni
 
MiL Testing of Highly Configurable Continuous Controllers
byLionel Briand
 
Fundamentals of Genetic Algorithms (Soft Computing)
byAmit Kumar Rathi
 
Uml Common Mechanism
bySatyamevjayte Haxor
 
2.2 decision tree
byKrish_ver2
 
Machine Learning-Linear regression
bykishanthkumaar
 
Unit II Study of Onchip Peripherals
byDr. Pankaj Zope
 
Embedded System Basics
byDr M Muruganandam Masilamani
 

Viewers also liked

PPT
Matlab Basic Tutorial
byMuhammad Rizwan
 
PPTX
All About MATLAB
byMultisoft Virtual Academy
 
PPT
Matlab Overviiew
byNazim Naeem
 
PDF
Matlab
byKelin Jose
 
PPTX
An Introduction To Python - Working With Data
byBlue Elephant Consulting
 
DOCX
Bubble sorting lab manual
bymaamir farooq
 
DOCX
PANCASILA (makalah falsafah pancasila)
bytita_chubie
 
PDF
MATLAB Assignment Help
byEssay Corp
 
PDF
Bin Sorting And Bubble Sort By Luisito G. Trinidad
byLUISITO TRINIDAD
 
PDF
Sorting bubble-sort anim
byFajarZain
 
PDF
Matlab graficos3 d
byRobert Axl Malaver Uriarte
 
PDF
Math review 12 B
bylsimonson
 
PPTX
Temperature
byjuwarto jawahir
 
PPTX
Intro to the line graph
byRichard McLaren
 
PDF
Facts about Thermometer - Mocomi.com
byMocomi Kids
 
PDF
PKI dan Kekejaman Terhadap Ulama
bya.r.i.e INSTITUTE, my future math project!
 
PPTX
Intro to the bar graph
byRichard McLaren
 
KEY
Data Display
byPhoebe Peng-Nolte
 
PPTX
Graphs
byKhun Khru
 
PDF
TNI AD Mengenai Komunis
bya.r.i.e INSTITUTE, my future math project!
 
Matlab Basic Tutorial
byMuhammad Rizwan
 
All About MATLAB
byMultisoft Virtual Academy
 
Matlab Overviiew
byNazim Naeem
 
Matlab
byKelin Jose
 
An Introduction To Python - Working With Data
byBlue Elephant Consulting
 
Bubble sorting lab manual
bymaamir farooq
 
PANCASILA (makalah falsafah pancasila)
bytita_chubie
 
MATLAB Assignment Help
byEssay Corp
 
Bin Sorting And Bubble Sort By Luisito G. Trinidad
byLUISITO TRINIDAD
 
Sorting bubble-sort anim
byFajarZain
 
Matlab graficos3 d
byRobert Axl Malaver Uriarte
 
Math review 12 B
bylsimonson
 
Temperature
byjuwarto jawahir
 
Intro to the line graph
byRichard McLaren
 
Facts about Thermometer - Mocomi.com
byMocomi Kids
 
PKI dan Kekejaman Terhadap Ulama
bya.r.i.e INSTITUTE, my future math project!
 
Intro to the bar graph
byRichard McLaren
 
Data Display
byPhoebe Peng-Nolte
 
Graphs
byKhun Khru
 
TNI AD Mengenai Komunis
bya.r.i.e INSTITUTE, my future math project!
 

Similar to Matlab basic and image

PPSX
matlab-130408153714-phpapp02_lab123.ppsx
bylekhacce
 
PDF
MATLAB Programming
byمحمدعبد الحى
 
PDF
MATLAB INTRODUCTION
byDr. Krishna Mohbey
 
PPT
MATLAB is a program for doing numerical computation. It was originally desig...
byserviceinternchoice
 
PPT
Matlab_Introduction_by_Michael_Medvinsky.ppt
bykhaliq1
 
PPT
MatlabIntroduction presentation xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
bydivyapriya balasubramani
 
PPT
Matlab Introduction for beginners_i .ppt
byDrSeemaBHegde1
 
PDF
Introduction to matlab
bySantosh V
 
PPT
Matlab practical and lab session
byDr. Krishna Mohbey
 
PPTX
Mbd dd
byAditya Choudhury
 
PPTX
MATLAB Workshop yugjjnhhasfhlhhlllhl.pptx
byprashantkumarchinama
 
PPT
Matlab anilkumar
byTHEMASTERBLASTERSVID
 
PPTX
Introduction to matlab lecture 1 of 4
byRanda Elanwar
 
PDF
Introduction to MATLAB
byDun Automation Academy
 
PDF
An Introduction to MATLAB with Worked Examples
byeAssessment in Practice Symposium
 
PPTX
Lines and planes in space
byFaizan Shabbir
 
PDF
Matlab
byHira Sisodiya
 
PPT
MatlabIntro1234.ppt.....................
byRajeshMadarkar
 
PDF
bobok
byAdi Pandarangga
 
PDF
Malab tutorial
bysisira senarathna
 
matlab-130408153714-phpapp02_lab123.ppsx
bylekhacce
 
MATLAB Programming
byمحمدعبد الحى
 
MATLAB INTRODUCTION
byDr. Krishna Mohbey
 
MATLAB is a program for doing numerical computation. It was originally desig...
byserviceinternchoice
 
Matlab_Introduction_by_Michael_Medvinsky.ppt
bykhaliq1
 
MatlabIntroduction presentation xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
bydivyapriya balasubramani
 
Matlab Introduction for beginners_i .ppt
byDrSeemaBHegde1
 
Introduction to matlab
bySantosh V
 
Matlab practical and lab session
byDr. Krishna Mohbey
 
Mbd dd
byAditya Choudhury
 
MATLAB Workshop yugjjnhhasfhlhhlllhl.pptx
byprashantkumarchinama
 
Matlab anilkumar
byTHEMASTERBLASTERSVID
 
Introduction to matlab lecture 1 of 4
byRanda Elanwar
 
Introduction to MATLAB
byDun Automation Academy
 
An Introduction to MATLAB with Worked Examples
byeAssessment in Practice Symposium
 
Lines and planes in space
byFaizan Shabbir
 
Matlab
byHira Sisodiya
 
MatlabIntro1234.ppt.....................
byRajeshMadarkar
 
bobok
byAdi Pandarangga
 
Malab tutorial
bysisira senarathna
 

Recently uploaded

PPTX
4 G8_Q3_L4 (Evaluating opinion editorials for textual evidence and quality).pptx
byNorafeSahagun
 
PPTX
How to Manage Package Reservation in Odoo 18 Inventory
byCeline George
 
PPTX
Pig- piggy bank in Big Data Analytics.ppt.pptx
byVarshini M
 
PPTX
PARENTAL ROUTES OF DRUGS ADMINISTRATION .pptx
byAneetaSharma15
 
PPTX
AN EXTREMELY BORING GENERAL QUIZ FOR UG.pptx
bySriramG47
 
PDF
Micro Economics for class 12 and class 11
bysurajbajaj4116
 
PDF
Using Charts and Tables in Presenting Data
byThelma Villaflores
 
PDF
IMANI Africa files RTI request seeking full disclosure on 2026 SIM registrati...
bynservice241
 
PDF
Most Imp Chapters & Weightage for Boards 2025.pdf
byTamannaSagar
 
PPTX
Multiple Linear Regression - Least Square Method X₁ on X₂ and X₃
bySundar B N
 
PPTX
3 G8_Q3_L3_ (Cartoon as Representation in Opinion Editorial Article).pptx
byNorafeSahagun
 
PPTX
The Cell & Cell Cycle-detailed structure and function of organelles.pptx
byAshish Umale
 
PPTX
Growth & Development MILESTONES (ADOLESCENTS ).pptx
byAneetaSharma15
 
PPTX
TAMIS & TEMS - HOW, WHY and THE STEPS IN PROCTOLOGY
byJohn Thanakumar
 
PPTX
10-12-2025 Francois Staring How can Researchers and Initial Teacher Educators...
byEduSkills OECD
 
PPTX
How to Track a Link Using Odoo 18 SMS Marketing
byCeline George
 
PPTX
Access partner report in Odoo 18.2 _ Odoo 19
byCeline George
 
PPTX
Partial Correlation of Coefficient - Values of r₁₂.₃, r₂₃.₁ & r₁₃.₂
bySundar B N
 
PDF
The Tale of Melon City poem ppt by Sahasra
bybitrasahasra
 
PDF
Multiple Myeloma , definition, etiology, PP, CM , DE and management
byNisha Borsa
 
4 G8_Q3_L4 (Evaluating opinion editorials for textual evidence and quality).pptx
byNorafeSahagun
 
How to Manage Package Reservation in Odoo 18 Inventory
byCeline George
 
Pig- piggy bank in Big Data Analytics.ppt.pptx
byVarshini M
 
PARENTAL ROUTES OF DRUGS ADMINISTRATION .pptx
byAneetaSharma15
 
AN EXTREMELY BORING GENERAL QUIZ FOR UG.pptx
bySriramG47
 
Micro Economics for class 12 and class 11
bysurajbajaj4116
 
Using Charts and Tables in Presenting Data
byThelma Villaflores
 
IMANI Africa files RTI request seeking full disclosure on 2026 SIM registrati...
bynservice241
 
Most Imp Chapters & Weightage for Boards 2025.pdf
byTamannaSagar
 
Multiple Linear Regression - Least Square Method X₁ on X₂ and X₃
bySundar B N
 
3 G8_Q3_L3_ (Cartoon as Representation in Opinion Editorial Article).pptx
byNorafeSahagun
 
The Cell & Cell Cycle-detailed structure and function of organelles.pptx
byAshish Umale
 
Growth & Development MILESTONES (ADOLESCENTS ).pptx
byAneetaSharma15
 
TAMIS & TEMS - HOW, WHY and THE STEPS IN PROCTOLOGY
byJohn Thanakumar
 
10-12-2025 Francois Staring How can Researchers and Initial Teacher Educators...
byEduSkills OECD
 
How to Track a Link Using Odoo 18 SMS Marketing
byCeline George
 
Access partner report in Odoo 18.2 _ Odoo 19
byCeline George
 
Partial Correlation of Coefficient - Values of r₁₂.₃, r₂₃.₁ & r₁₃.₂
bySundar B N
 
The Tale of Melon City poem ppt by Sahasra
bybitrasahasra
 
Multiple Myeloma , definition, etiology, PP, CM , DE and management
byNisha Borsa
 

Matlab basic and image

  • 1.
  • 2.
    MATLAB Introducing MATLAB –Language of technical computing 2 Is an integrated technical computing environment that combines numeric computation, advanced graphics and visualization, and a high-level programming language. The MathWorks, Inc. High-level language of technical computing Development environment for engineers, scientists Interactive tools for design, problem solving Mathematical function libraries Graphics and data visualization tools Custom GUIs External Interfaces: C, C++, Fortran, Java, COM, Excel, .NET
  • 3.
    MATLAB product family Toolboxes:Collections of specialized Functions Graphics 2D Graphics 3D Graphics Color & Lighting Animation Image, Audio & Video Computations Linear Algebra Data Analysis Polynomials Interpolations Solutions of ODE External Interfaces C C++ JAVA .net Micorosoft Excel Parallel Computing Math, Statistics, and Optimization Control System Design and Analysis Signal Processing and Communications Image Processing and Computer Vision Test and Measurement Built-in Functions User-written Functions MATLAB Computational Finance Computational Biology Code Generation and Verification Application Deployment Database Connectivity and Reporting MATLAB Programming Language Parallel Computing Toolbox MATLAB Distributed Computing Server Parallel Computing Symbolic Math Toolbox Partial Differential Equation Toolbox Statistics Toolbox Curve Fitting Toolbox Optimization Toolbox Global Optimization Toolbox Neural Network Toolbox Model-Based Calibration Toolbox Math, Statistics, and Optimization Control System Toolbox System Identification Toolbox Fuzzy Logic Toolbox Robust Control Toolbox Model Predictive Control Toolbox Aerospace Toolbox Control System Design and Analysis Signal Processing Toolbox DSP System Toolbox Communications System Toolbox Wavelet Toolbox Fixed-Point Toolbox RF Toolbox Phased Array System Toolbox Signal Processing and Communications Image Processing Toolbox Computer Vision System Toolbox Image Acquisition Toolbox Mapping Toolbox Image Processing and Computer Vision Data Acquisition Toolbox Instrument Control Toolbox Image Acquisition Toolbox OPC Toolbox Vehicle Network ToolboxTest and Measurement Financial Toolbox Econometrics Toolbox Datafeed Toolbox Database Toolbox Computational FinanceSpreadsheet Link EX (for Microsoft Excel) Fixed-Income Toolbox Financial Derivatives Toolbox Bioinformatics Toolbox SimBiology Computational Biology MATLAB Coder HDL Coder HDL Verifier Filter Design HDL Coder Code Generation and Verification MATLAB Compiler MATLAB Builder NE (for Microsoft .NET Framework) MATLAB Builder JA (for Java language) MATLAB Builder EX (for Microsoft Excel) Spreadsheet Link EX (for Microsoft Excel) Application Deployment Database Toolbox MATLAB Report Generator Database Connectivity and Reporting Introducing MATLAB – Language of technical computing 3
  • 4.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB 4
  • 5.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB 5 Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Conditional control statements Loop control statements Functions – creating & executing a function file MATLAB for Image Processing
  • 6.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 6 Conditional control statements Loop control statements
  • 7.
    The main windowcharacterized by the MATLAB command prompt (>>) Command Window This is where you write, edit, create, and save your own script or programs in files called m-files. Editor Window This is where all your files from the current directory are listed. Current Directory All commands typed on MATLAB prompt in the command window get recorded, even across multiple session in this window. Command History This subwindow lists all variables that you have generated so far along with there type and size. Workspace MATLAB - Desktop Minimal MATLAB 7
  • 8.
    MATLAB - Desktop Themain window characterized by the MATLAB command prompt (>>) Help Window Minimal MATLAB 8
  • 9.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 9 Conditional control statements Loop control statements
  • 10.
    Basic Data andVariables Computing with MATLAB Class Variable SizeValue Minimal MATLAB 10
  • 11.
    Basic Data andVariables Computing with MATLAB Multidimensional Array [full or sparse] Scalar  logical ab char { } cell struct function handle (@)numeric int8, uint8, int16, unit16, int32, unit32, int64, unit64 single double Minimal MATLAB 11
  • 12.
    Arithmetic Operator & TheirPrecedence Computing with MATLAB Operations Operators Examples Addition Subtraction Multiplication Right Division Left Division Exponentiation + − * / ^ >> 𝟓 + 𝟑 >> 𝟓 − 𝟑 >> 𝟓 ∗ 𝟑 >> 𝟓/𝟑 >> 𝟓𝟑 = 𝟑/𝟓 >> 𝟓^𝟑 (means 𝟓 𝟑 = 𝟏𝟐𝟓) Precedence Order Operators 1 2 3 4 Parentheses ( ). For nested parentheses, the innermost are executed first. Exponentiation, ^ Multiplication, *; Division, /, Addition, +; Subtraction, - help precedence Minimal MATLAB 12
  • 13.
    Computing with MATLAB MathematicalFunctions Trigonometry sind cosd tand cotd secd cscd Degree sin cos tan cot sec csc sinh cosh tanh coth sech csch asin acos atan acot asec acsc Basic Hyperbolic Inverse Radian Basic Exponential exp log log10 log2 sqrt Complex abs conj imag real angle Matrix det trace rank inv expm sqrtm Discrete Math factorial gcd lcm primes help <type function name> Minimal MATLAB 13
  • 14.
    Predefined Variables and Keywords ans pi eps inf i,j NaN Avariable that has the value of the last expression that was not assigned to a specific variable The number π. The smallest difference between two numbers. Equal to 2^(–52), which is approximately 2.2204e–016. Used for infinity. Defined as −1, which is: 0 + 1.0000i. Stands for Not-a-Number. Used when MATLAB cannot determine a valid numeric value. Example: 0/0. Predefined Variables break case catch classdef continue else elseif end for function global if otherwise parfor persistent return spmd switch try while Keywords iskeyword help <Predefined Variable Name> Computing with MATLAB Minimal MATLAB 14
  • 15.
    Managing Variables clear clear xy z clear all who Clears the workspace, all variables are removed from the memory Clears only variables x, y, and z Clears all variables and functions from workspace Lists variables currently in the workspace Command Outcome Computing with MATLAB Minimal MATLAB 15
  • 16.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 16 Conditional control statements Loop control statements
  • 17.
    Overview Array 5 5 7 45 7 4 510 56 6 4 6 7 78 86 Scalar of 1 X 1 Row Vector of 1 X 3 Column vector of 3 X 1 One Dimensional Matrix of 3 X 3 5 10 56 85 23 6 4 6 23 2 7 78 86 53 6 5 14 12 10 56 6 10 504 4 6 89 0 Two Dimensional Matrix of 3 X 5 5 10 56 85 23 6 4 6 23 2 7 78 86 53 6 5 14 12 10 56 6 0 5 14 12 10 56 89 0 Three Dimensional Matrix of 3 X 5 Minimal MATLAB 17
  • 18.
    Creation Array One Dimensional Array variable_name= [ type vector elements ] Minimal MATLAB 18 Two Dimensional Array variable_name = [1st row elements; 2nd row elements; 3rd row elements; ... ; last row elements]  from a known list of numbers  with constant spacing by specifying the first term, the spacing, and the last term Known lists of numbers
  • 19.
    Array Minimal MATLAB 19 Creation Creatinga vector with constant spacing by specifying the first term, the spacing, and the last term: variable_name = [m:q:n] or variable_name = m:q:n m = first term q = spacing n = last term : (colon operator)Constant spacing Creating a vector with linear (equal) spacing by specifying the first and last terms, and the number of terms: variable_name = linspace(xi, xf, n) xi = first element xf = Last element n = number of elements linspaceConstant spacing
  • 20.
    Array Minimal MATLAB 20 ArrayOperators + Addition - Subtraction .* Element-by-element multiplication ./ Element-by-element division . Element-by-element left division .^ Element-by-element power ‘ Transpose Operations Operation 𝐴 = 1 3 4 2 𝐵 = 2 3 5 7 𝐶 = 𝐴.∗ 𝐵 = 2 9 20 14 𝐶 = 1 × 2 3 × 3 4 × 5 2 × 7
  • 21.
    Data Manipulation Array Minimal MATLAB21 Addressing - Extraction (Subset) Addressing an element(s) individually or in subgroups:  To redefine only some of the elements,  When specific elements are to be used in calculations,  When a subgroup of the elements is used to define a new variable.
  • 22.
    Array Minimal MATLAB 22 Addressvector >> ve = [35 46 78 23 5 14 81 3 55] ve = 35 46 78 23 5 14 81 3 55 1 2 3 4 5 6 7 8 9 position or index of element Data Manipulation
  • 23.
    Array Minimal MATLAB 23 Addressmatrix ) (1,1) (1,2) (1,3) (1,4) (2,1) (2,2) (2,3) (2,4) (3,1) (3,2) (3,3) (3,4) 3 11 6 5 4 7 10 2 13 9 0 8 MAT = Data Manipulation
  • 24.
    Array Minimal MATLAB 24 Addressingvector : (colon operator) Data Manipulation Addressing matrix : (colon operator) A(:,n) Refers to the elements in all the rows of column n of the matrix A. A(n,:) Refers to the elements in all the columns of row n of the matrix A. A(:,m:n) Refers to the elements in all the rows between columns m and n of the matrix A. A(m:n,:) Refers to the elements in all the columns between rows m and n of the matrix A. A(m:n,p:q) Refers to the elements in rows m through n and columns p through q of the matrix A.
  • 25.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 25 Conditional control statements Loop control statements
  • 26.
    Creation Plotting Minimal MATLAB 26 Example DampedOscillation equation: 𝒚 = 𝒆−𝒂𝒕 𝐜𝐨𝐬 (𝒃𝒕)
  • 27.
    Creation Plotting Minimal MATLAB 27 Example DampedOscillation equation: 𝒚 = 𝒆−𝒂𝒕 𝐜𝐨𝐬 (𝒃𝒕) a = 0.1; b = 1; t = 0:0.1:20; y = exp(-a*t).*cos(b*t); plot(t,y) grid on; xlabel('Time in second'); ylabel('Response in mm'); title('Damped Oscillation'); legend('a = 0.1,b = 1)'); 1- 2- 3- 4- 5- 6- 7- 8- 9-
  • 28.
  • 29.
    Graphing Plotting Minimal MATLAB 29 Plotfunction plot(x,y) where the variables x and y are vector and must be of same size i.e the number of elements should be equal. x=[1 2 3 5 7 7.5 8 10]; y=[2 6.5 7 7 5.5 4 6 8]; plot(x,y)
  • 30.
    Graphing Plotting Minimal MATLAB 30 Plotfunction plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) Line specifiers are optional and can be used to define the style and color of the line and the type of markers (if markers are desired). Line specifiers solid (default) dashed dotted dash-dot Line Style Specifier - -- : -. red green blue cyan Line color Specifier r g b c magenta yellow black white Line color Specifier m y k w
  • 31.
    Graphing Plotting Minimal MATLAB 31 Plotfunction plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) Line specifiers are optional and can be used to define the style and color of the line and the type of markers (if markers are desired). Line specifiers plus sign circle asterisk point cross triangle (pointed up) triangle (pointed down) Marker type Specifier + o * . × ^ v square diamond five pointed star six pointed star triangle (pointed left) triangle (pointed right) Marker type Specifier s d p h < >
  • 32.
    Graphing Plotting Minimal MATLAB 32 Plotfunction plot(x,y,‘line specifiers’,‘PropertyName’,PropertyValue) To specify the thickness of the line, the size of the marker, and the colors of the marker’s edge line and fill Property Name
  • 33.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 33 Conditional control statements Loop control statements
  • 34.
    Creation Script Minimal MATLAB 34 Overview Sequenceof MATLAB statements in fileScript A script file is an external file that contains a sequence of MATLAB statements. Script files have a filename extension of .m.
  • 35.
    Basics Script Minimal MATLAB 35 variable_name= input(‘prompt message’) Accepting input from user Displaying output to user disp(name of a variable) disp(‘text as string’) Saving script file Creating script file Executing script file
  • 36.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 36 Conditional control statements Loop control statements
  • 37.
    Creation Script Minimal MATLAB 37 ConditionalStatement Conditional expression consisting of relational and/or logical operators. Operations Operators Less than Greater than Less than or equal to Greater than or equal to Equal to Not Equal to < > <= >= == ~= Relational Operators Operations Operators And Or Not && || ~ Logical Operators
  • 38.
    Creation Script Minimal MATLAB 38 Example 𝑔𝑡 = 0, 𝑡 < −2 −4 − 2𝑡, −2 < 𝑡 < 0 −4 − 3𝑡, 0 < 𝑡 < 4 16 − 2𝑡, 4 < 𝑡 < 8 0, 𝑡 > 8 Plot g1 g2 g3 t = linspace(-5,10); g1 = -4 - 2*t; g2 = -4 + 3*t; g3 = 16 - 2*t; g = g1.*(-2<t & t<=0)... + g2.*(0<t & t<=4)... + g3.*(4<t & t<=8); plot(t,g) 1- 2- 3- 4- 5- 6- 7- g1 g2 g3
  • 39.
    if/elseif/else Statement Script Minimal MATLAB39 if statement Statement Group 1 False True End Statement Group 2 if expression statements elseif expression statements else statements end
  • 40.
    Creation Script Minimal MATLAB 40 SwitchStatement False True Flowchart match case, k case end False case statement, k True switch switch_expression case case_expression statements case case_expression statements : otherwise statements end
  • 41.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 41 Conditional control statements Loop control statements
  • 42.
    Loop control statements Script MinimalMATLAB 42 for (Iterative Loop) while (Conditional Loop) continue, break for index = start:increment:end statements end while expression statements end
  • 43.
    Agenda Introducing MATLAB –Language of technical computing Minimal MATLAB MATLAB Desktop Computing with MATLAB Array – creation & working Plotting – creating & visualizing Automating commands – creating, saving & executing script file Functions – creating & executing a function file 43 Conditional control statements Loop control statements
  • 44.
    Creation Function Minimal MATLAB 44 Overview SYSTEM [Mathematicalmodel of Physical Phenomenon] (function file) Set of inputs Set of outputs 1 2 3 m 1 2 3 n [System] Electrical Networks Communication System Control System Thermodynamic System Computer system, etc [Input variables] current, voltage, power, energy, temperature, data [Output variables] current, voltage, power, energy, temperature, Processed data function [out1, out2, ...] = func_name(in1, in2, ...) declares the function func_name, and its inputs and outputs
  • 45.
    Creation Function Minimal MATLAB 45 Example 𝐻= 𝑦 𝑥 = 1 1 + (𝜔𝑅𝐶)2 Black BoxX Y function H = lp(R,C) w = logspace(-2,6); H = 1./sqrt(1 + (w*R*C).^2); semilogx(w,H) xlabel('Angular frquency, w (rad/s)'); ylabel('System Response'); title('Low-Pass frequency response'); 1- 2- 3- 4- 5- 6- Source: MATLAB An Introduction with Applications, Amos Gilat, 4e
  • 46.
  • 47.
    Creation Function Minimal MATLAB 47 Example BlackBox 𝑇 𝑇𝑑 𝑇 𝑤 𝐵𝑃 𝑅𝐻 𝑅𝐻 = 100 𝑒 𝑒𝑠 𝑇𝑑 = 243.5 ln( 𝑒 6.112 ) 17.67 − ln( 𝑒 6.112 ) 𝑇𝑑, dew point temperature °𝐶 𝑇, dry-bulb temperature °𝐶 𝑇 𝑤, wet-bulb temperature °𝐶 𝐵𝑃, barometric temperature in millibars 𝑅𝐻, relative humidity in % 𝑃𝑠 = 6.112 exp 17.67𝑇 𝑇 + 243.5 𝑃𝑤 = 6.112 exp 17.67𝑇 𝑤 𝑇 𝑤 + 243.5 𝑒 = 𝑒 𝑤 − 𝐵𝑃 𝑇 − 𝑇 𝑤 0.00066(1 + 0.00115𝑇 𝑤) Source: MATLAB An Introduction with Applications, Amos Gilat, 4e
  • 48.
    Creation Function Minimal MATLAB 48 Example function[Td, RH] = DewptRhum(T,Tw,BP) es = 6.112*exp((17.67*T)/(T + 243.5)); ew = 6.112*exp((17.67*Tw)/(Tw + 243.5)); e = ew - BP*(T - Tw)*0.00066*(1 + 0.00115*Tw); RH = 100*(e/es); Td = (243.5*log(e/6.112))/(17.67 - log(e/6.112)); 1- 2- 3- 4- 5- 𝑇 = 25°𝐶, 𝑇 𝑤 = 19°𝐶, 𝐵𝑃 = 985 𝑚𝑖𝑙𝑙𝑖𝑏𝑎𝑟 Calculate 𝑻 𝒅 =? , 𝑹𝑯 =? 𝑇 = 36°𝐶, 𝑇 𝑤 = 31°𝐶, 𝐵𝑃 = 1020 𝑚𝑖𝑙𝑙𝑖𝑏𝑎𝑟
  • 49.
    Creation Function Minimal MATLAB 48 Visualizationand Graphics • plot(x,y),plot(x,sin(x)) – plot 1D function • figure, figure(k) – open a new figure • hold on, hold off – refreshing • axis([xmin xmax ymin ymax]) – change axes • title(‘figure titile’) – add title to figure • mesh(x_ax,y_ax,z_mat) – view surface • contour(z_mat) – view z as topo map • subplot(3,1,2) – locate several plots in figure
  • 50.
    • MATLAB canimport/export several image formats: – BMP (Microsoft Windows Bitmap) – GIF (Graphics Interchange Files) – HDF (Hierarchical Data Format) – JPEG (Joint Photographic Experts Group) – PCX (Paintbrush) – PNG (Portable Network Graphics) – TIFF (Tagged Image File Format) – XWD (X Window Dump) – raw-data and other types of image data • Typically switch images to double to perform any processing and convert back to unsigned integer • Data types in MATLAB – Double (64-bit double-precision floating point) – Single (32-bit single-precision floating point) – Int32 (32-bit signed integer) – Int16 (16-bit signed integer) – Int8 (8-bit signed integer) – Uint32 (32-bit unsigned integer) – Uint16 (16-bit unsigned integer) – Uint8 (8-bit unsigned integer) Images in MATLAB
  • 51.
    • Binary images: {0,1} • Intensity images : [0,1] or uint8, double etc. • RGB images : m × n × 3 • Multidimensional images: m × n × p (p is the number of layers) Images in MATLAB
  • 52.
    Image Import andExport • Read and write images in Matlab img = imread('apple.jpg'); dim = size(img); figure; imshow(img); imwrite(img, 'output.bmp', 'bmp'); • Alternatives to imshow imagesc(I) imtool(I) image(I)
  • 53.
    Images and Matrices Column1 to 256 Row1to256 o [0, 0] o [256, 256] How to build a matrix (or image)? Intensity Image: row = 256; col = 256; img = zeros(row, col); img(100:105, :) = 0.5; img(:, 100:105) = 1; figure; imshow(img);
  • 54.
    Images and Matrices BinaryImage: row = 256; col = 256; img = rand(row, col); img = round(img); figure; imshow(img); size(im)
  • 55.
    Image Display • image- create and display image object • imagesc - scale and display as image • imshow - display image
  • 56.