This document provides an introduction and overview of MATLAB and GUI development in MATLAB. It covers key topics such as the MATLAB screen and interface, variables and arrays, vector and matrix generation and operations, flow control and loops, functions, and building GUI applications using GUIDE and callbacks. It also provides some useful tips for working with images and dialog boxes in MATLAB GUIs.

1. INTRO TO MATLAB + GUI
By Syed Owais Ali Chishti
(P146011)

2. INTRODUCTION
 MATLAB stands for Matrix Laboratory.
 MATLAB had many functions and toolboxes
 Integration
 Image Processing
 Linear Algebra
 …
 Is high level language
 Solves computing problems
 in a fraction of the time
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3. MATLAB SCREEN
 Command Window
 type commands
 Current Directory
 View folders and m-files
 Workspace
 View program variables
 Double click on a variable
to see it in the Array Editor
 Command History
 view past commands
 save a whole session
using diary
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4. VARIABLE
No need for types
int a = 10;
float pie = 3.1415;
All variable are of double precision unless specified
pie = 3.1415
s = 123
All variable are 1x1 matrices
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5. ARRAY
a vector
 x = [1 2 5 1]
 x = 1 2 5 1
a matrix
 x = [1 2 3; 5 1 4; 3 2 -1]
transpose
 y = x’
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6. VECTOR/MATRIX GENERATION
t = [1:10]
 t = 1 2 3 4 5 6 7 8 9 10
x = [1:4; 5:8]
x =
 1 2 3 4
 5 6 7 8
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7. MATRIX INDEX
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8. MATRIX OPERATIONS
+ addition
- subtraction
* multiplication
/ division
^ power
‘ complex conjugate transpose
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9. FLOW CONTROL
if ((a>3) & (b==5))
Some matlab Commands;
elseif (a < 2)
Some matlab commands;
else
Some matlab commands;
end
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10. LOOPS
for i=1:100
Matlab Commands;
end
while (condition)
Matlab Commands;
end
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11. FUNCTIONS
 No return keyword
 function out1=fname(in1,in2,in3)
 Some commands
 function [out1,out2]=name(in1,in2)
 EXAMPLE
 function [out1, out2] = sumprod(array)
out1 = sum(array)
out2 = prod(array)
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12. GUI APPLICATION
 Starting new App
 Home > New > App > GUIDE
 Home > New > App > App Designer
 GUIDE
 Procedural
 App Designer
 Object Oriented
 Both have same components
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13. GUIDE QUICK START
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14. ADD COMPONENTS
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15. CALLBACK
Catchable event of Button
Callback (OnClick)
Create –When button is created
Delete – button is delete
ButtonDown
KeyPress
Execute when event/callback occur
Jumps to that code
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16. COMPONENT INSPECTOR
• Set String Property of Button
• set(handles.pushbutton1,‘String',‘test');
• Get String Property of Button
• get(handles.pushbutton1,‘String');
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17. SOME USEFULTIPS
 Open Dialog Box
 [filename,pathname] = uigetfile('*.bmp;','Select bmp file');
 Save Dialog Box
 [filename, pathname] = uiputfile('*.bmp;','Save Image', filename);
 sum – Add all element of matrix or vector
 mean – Return mean of matrix or vector
 strcat – String concatenation (+ operator for string not supported)
 a(:) – Return Nx1 matrix considering a multi-dimensional.
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18. SHOWING IMAGE
Add Axes component in GUI
Call imshow([…])
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19. THANKYOU!

20. REFERENCES
 www.eee.metu.edu.tr/~yozbek/PDF430/Introduction%20to%20Matlab.ppt
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