topoplot function is undefined

Hi, I am trying to use the function topoplot to plot EEG data in a 2D figure.

figure(1), clf 
topoplot('variable',EEG.chanlocs); 
title([ 'Topoplot from time=' num2str(EEG.times(time2plot)) ' ms.' ])

But it comes up the following error:

Undefined function or variable 'topoplot'.

How can I fix that?

(Matlab 2019a)

Answer 1

[Adam Danz]

topoplot is not a function provided by MATLAB (r2022b). A google search for "matlab topoplot" shows several 3rd party functions with that name such as this one and it's git hub files. But the first argument seems to be a numeric vector in those files while your first argument is a character vector.

1. Find the right file
2. Make sure your inputs are correct.