How to define a function in the command window?

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Pedro 2012-10-4

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https://ww2.mathworks.cn/matlabcentral/answers/49860-how-to-define-a-function-in-the-command-window

编辑： Allen 2024-2-11

I'm trying to define the function

t=1:1/8000:5
x(n)=sin(2*pi*t(n))

I've tried function x(n)=sin(2*pi*t(n)) like you would do in the editor but it doesn't work. What's the correct sintax?

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Answer 1

Walter Roberson 2012-10-4

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在 MATLAB Online 中打开

At the command window, you can use

x = @(n) sin(2*pi*t(n));

This will create the function named "x" that takes a single parameter, n.

Note that this function will not be available within other functions unless it is passed as a parameter to the other function: its definition will be local to the scope it is in.

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Yongkai liu 2019-1-21

Thanks! works!

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Answer 2

Jan 2012-10-4

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Functions can be defined in M-files only. In addition these M-files must be functions itself, so scripts are not allowed. And an M-file is a function, if it starts with the term "function".

Reading the Getting Started chapters of the documentation is obligatory, when you want to use such a powerful tool as Matlab.

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Allen 2024-2-11

编辑：Allen 2024-2-11

Which part of the numerous Getting Started chapters may that be?

Be more specific... use SEER - State, Elaborate, Eample, Reiterate. Provide links or clearly indicate where to look. We all have to learn at one point in time.

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