error running a function

the fftshow function does not work

Answer 1

[John D'Errico]

which fftshow -all

'fftshow' not found.

fftshow is not a function that is part of MATLAB, or in any of its toolboxes. Perhaps you found it in some code from the file exchange, or perhaps you wrote it yourself, or perhaps your teacher gave it to you to use. But nobody can help you to use a function that nobody has.