This document provides an introduction to MATLAB presented by Chris Diduch at the Royal Bhutan University. It outlines Chris Diduch's background and research interests. It then describes what MATLAB is, its features and toolboxes. It discusses MATLAB windows, data types, programming, graphics, and help resources. It also covers matrices, element-by-element operations, trajectories of projectiles, and the MATLAB path and present working directory.

1. Introduction to
MATLAB
Chris Diduch
University of New Brunswick
January 31 – February 4, 2004
Royal Bhutan University
RBIT, Rinchending
Day-1

2. Who is your instructor?
Chris Diduch
Professor
Electrical and Computer Engineering
University of New Brunswick
Fredericton, Canada, E3B 5A3
diduch@unb.ca

3. Research Interests
 Control systems,
 Computer control systems
 Failure detection and isolation
 Embedded and real time systems
 Applications: control of electric drives,
robotics, injection molding machines,
distributed power systems.

4. Courses
 Electricity and magnetism, circuits, systems
dynamics, microprocessors, embedded systems
and digital interfacing, robotics, real time
systems, VLSI design
 Advanced control systems, computer control
systems

5. What is MATLAB?
 MATrix LABoratory
 Originated as a vehicle for teaching and applying
linear algebra and numerical methods.
 Rapid analysis, design and prototyping.
 Arrays are the basic data type.
 Built-in functions are optimized for vector operations.
z=x*y z=[]
for i=1:5
z=z+x[i]*y[i]
end

6. MATLAB
MATLAB Toolboxes
Signal Processing
Neural Networks
Communications
Image Processing …
Programming
Language
Graphics
2D
3D
Color
Lighting
Animation…
External Files
Fortran and C…
Computation
Linear
Algebra
Data Analysis
Sig Process
Polynomials
Integration
ODE's …
3rd Party
Toolboxes
Robotics
Robot
Vision …
Physical IO
Analog
Digital …
Simulink
Stateflow
RT Workshop
Data Acquisition
xPC Target
Built-in Functions User-written Functions

7. Features of MATLAB
 The MATLAB programming language
 Built-in MATLAB functions
 Graphics
 Linear algebra
 Data analysis
 Signal processing
 Polynomials and interpolation
 Numerically solving differential equations
 External interfaces: C, Fortran

8. The Student Edition of
MATLAB
 MATLAB Toolboxes
 Simulink
 Signal Processing Toolbox
 Symbolic Math Toolbox
 Where Do I Get MATLAB? On-line Help?
www.mathworks.com

9. MATLAB Windows
 Launchpad Window (I call it the MATLAB
window)
 Command Window
 Workspace Window
 Command History Window
 Current Directory Window
 Edit Window
 Graphics Window

10. Help and Assistance
 command lookfor
 command help
 command helpwin
 command helpdesk
 command demo

11. MATLAB Data Types
 Basic type is the array
 Dimensioning is automatic
 Data objects:
 integers
 double
 matrices
 character (or text) strings
 structures
 cells

12. Display and Formatting
 MATLAB is case sensitive
 A semi-colon at the end of a line suppresses
screen output
 To display one page at a time type more on
 Display formats:
 short
 long
 e, g, hex
 rat, bank

13. MATLAB File Types
 M-files: scripts and functions are saved as
text files with a .m extension
 Mat-files: workspace variables are saves as
binary files with a .mat extension.
 Mex-files: MATLAB callable Fortran and C
programs with a .mex extension.
 Fig-files: the saved form of a figure window.

14. Where do we use MATLAB?
 Linear Algebra MATH 1503
 Simulation & Analysis CMPE 2013
 Systems and Control EE 3313, EE 3323
 Signals EE 3513, Industrial Control EE 4343
 Robotics EE 4353
 Power Systems EE 4411
 Algorithms in Real Time CMPE 4543
 Research and Graduate courses

15. On-line Help
 help FunctionName or ScriptName
 help help
 lookfor Name
 demo
 helpwin
 helpdesk

16. Overview
 MATLAB windows and basic operations
 Programming in MATLAB
 Analysis
 Graphics
 Toolboxes

17. On-line Course Material
 The workbook and all of the program
examples are available on-line at:
 http://www.ece.unb.ca/Courses/Matlab/CD

18. Element-by-Element
Operations
 Use dot operation for element-by-element
operations
 .* ./ .^
 A = [a1 a2 a3]
 B = [b1 b2 b3]
 C = A .op B says
 C= [a1 op b1, a2 op b2, a3 op b3]

19. Syntax
 sin2(t) sin(t)^2

20. Matrices











)
4
,
3
(
)
3
,
3
(
)
2
,
3
(
)
1
,
3
(
)
4
,
2
(
)
3
,
2
(
)
2
,
2
(
)
1
,
2
(
)
4
,
1
(
)
3
,
1
(
)
2
,
1
(
)
1
,
1
(
A
A
A
A
A
A
A
A
A
A
A
A
A
Column
Row

21. Trajectory of a Projectile
θ
H
y
x
v0
v(t)

22. MATLAB Path and PWD
 PWD: present working directory
 Default is: /matlab/path
 The MATLAB path:
 All MATLAB directories are included in the
search path.
 You may add paths to your directories

23. For First Time Users
 Issues
 Not being in the right directory
 Not saving files in the right directory
 Not updating an existing function or script file
while editing.
 Default working directory is
…/MATLAB/WORK