topoplot function is undefined

Question

Denise Dal Lago 2022-10-6

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1818815-topoplot-function-is-undefined

回答： Adam Danz 2022-10-6

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)

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Answer 1

Adam Danz 2022-10-6

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https://ww2.mathworks.cn/matlabcentral/answers/1818815-topoplot-function-is-undefined#answer_1068200

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.