1. Objective: To be able to create script and function files
SE207 Lab 2
Objective:
To be able to create script and function files

2. MATLAB Files Two types of files: Both have the extension .m [ M-files]
SCRIPT files
FUNCTION files
Both have the extension .m [ M-files]
(file1.m, f2.m)

3. M-files t=0:0.1:10 y=sin(t) plot(t,y) function [y]=fplot2(t) y=sin(t)
SCRPT Files:
a list of MATLAB instructions
saved on a file for convenience
no input argument
The variables are global
FUNCTION files
Starts with “FUNCTION “ statement that specifies the input and output arguments
Local variables
Treated as the built-in functions
t=0:0.1:10
y=sin(t)
plot(t,y)
function [y]=fplot2(t)
y=sin(t)
plot(t,y)

4. Function M-files function y=fplot(t) y=sin(t);
create an m-file and save it as fplot.m
FILE
New
M-file
function y=fplot(t)
y=sin(t);
Open
M-file
MATLAB Command Window
>> t=0:0.1:10
>> z=fplot(t)
>> plot(t,z)

5. MATRIX OPERATIONS Transpose A’ inverse inv(A) determinant det(A)
rank rank(A)

6. Special functions Exponential exp(x) square root sqrt(x)
natural logarithm log(x)
common logarithm log10(x)
absolute value abs(x)
more details
Use help to know
related functions

7. If structures General form: If condition statements else end
If (x>0)
f=x^2
else
f=0
end

8. for loops General form: special case for index=initial: limit
for index=initial: increment: limit
statements
end
special case
if increment is 1
for index=initial: limit
for i=1:100
x(i)=sin(i*.2)
end