matlab_overview.pdf
版权申诉
75 浏览量
2023-06-18
13:14:11
上传
评论
收藏 249KB PDF 举报
MATLAB Overview
MATH2070: Numerical Methods in Scientific Computing I
Location: http://people.sc.fsu.edu/∼jburkardt/classes/math2070 2019/matlab overview/matlab overview.pdf
The interactive MATLAB language lets us do computational experiments.
If you are completely new to MATLAB, then you should review the information at places like the MATH-
WORKS tutorial website: https://www.mathworks.com/support/learn-with-matlab-tutorials.html
1 The Very Basics
When you start MATLAB, you see a command window with a prompt sign
1 >>
This is where you type your commands.
You can give simple arithmetic commands like 98-53, but most MATLAB commands will involve computing
something and storing the result in a named variable. Once a variable has a value, it can be used in later
computations:
1 >> x = 0 . 9 9
2 >> y = x ∗ x % This c oul d a l s o be w r i t t e n as x ˆ2
Arithmetic operators include +, -, *, /, ^ . Mathematical functions include abs(), max(), min(),
mod(), sqrt(), and trig functions like sin(), cos().
When a statement computes a value, that value will be printed to the command window. If this is not
desired, simply terminate the statement with a semicolon.
2 M Files
While interactive access to MATLAB is useful, it is often necessary to enter long complicated instructions.
In such a case, it is better to store these instructions as an M file. An M file can be created by any text editor,
or you can use MATLAB’s editor by choosing the NEW menu item and selecting Script or Function. You
can type in your commands, and then save the file, giving it a name, such as pde.m. Once the file is saved,
you can run the commands in the file by typing its name, as in
1 >> pde
or, if this is a function file, you might supply input and collect the resulting output:
1 r e s u l t = la m ber t ( x )
1
资源评论
