The Basic Ideas about the MATLAB+GUI For more Details Go to the Reference Link.

1. INTRO TO MATLAB + GUI
By Asjad Ali
(P146100)

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
2

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
3

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
4

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’
5

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
6

7. MATRIX INDEX
7

8. MATRIX OPERATIONS
+ addition
- subtraction
* multiplication
/ division
^ power
‘ complex conjugate transpose
8

9. FLOW CONTROL
if ((a>3) & (b==5))
Some matlab Commands;
elseif (a < 2)
Some matlab commands;
else
Some matlab commands;
end
9

10. LOOPS
for i=1:100
Matlab Commands;
end
while (condition)
Matlab Commands;
end
10

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)
11

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
12

13. GUIDE QUICK START
13

14. ADD COMPONENTS
14

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
15

16. COMPONENT INSPECTOR
• Set String Property of Button
• set(handles.pushbutton1,‘String',‘test');
• Get String Property of Button
• get(handles.pushbutton1,‘String');
16

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.
17

18. SHOWING IMAGE
Add Axes component in GUI
Call imshow([…])
18

19. THANKYOU!

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