Variable

Matlab undefined variable or class

Matlab undefined variable or class
  1. Can you use undefined variables in MATLAB?
  2. What does (~) mean in MATLAB?
  3. Why is my variable not recognized in MATLAB?

Can you use undefined variables in MATLAB?

If you are trying to solve equations, at least use sym s to create s as a symbolic variable. You can't use any undefined variables in Matlab.

What does (~) mean in MATLAB?

Direct link to this answer

https://www.mathworks.com/matlabcentral/answers/275478-the-meaning-of-in-a-matrix#answer_215048. Helpful (1) Helpful (1) The tilde '~' in a function output tells MATLAB to not import that output in the calling function workspace.

Why is my variable not recognized in MATLAB?

Accepted Answer

MATLAB does not recognize the specified string as the name of a function on the MATLAB path or as a variable. The above error messages can be caused by: 1) Trying to use a variable that has not been defined before this line of code executes. Undefined function or variable 'y'.

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