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Two sample t-test not working

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Abdullah Azzam
Abdullah Azzam am 22 Mai 2019
Kommentiert: Abdullah Azzam am 22 Mai 2019
Hi guys I have tried to conduct a two sample t test on two matrix x and y where x is a 175x16 matrix and y is 1x16 matrix but the matlab gives me the following error:
h=ttest2 (x,y)
Error using mean
Too many output arguments.
Error in nanmean (line 17)
y = mean(varargin{:},'omitnan');
Error in ttest2 (line 171)
difference = nanmean(x,dim) - nanmean(y,dim);
Does anyone know a soultion for this?
Thanks for the help in advance.
  4 Kommentare
Adam Danz
Adam Danz am 22 Mai 2019
Somewhere in your code there is a custom function named "mean" (or it could be a global variable). You have to find where that happens and rename it to something else.
I'd start by searching for
which mean -all
which will likely list several function on your path, many of which will be followed by "Shadowed...". You'll need to look for any custom function in that list.
A temporary solution would be to clear "mean" just prior to calling ttest2() but this doesn't address the root of the problem.
clear('mean')
ttest2(....)
Abdullah Azzam
Abdullah Azzam am 22 Mai 2019
It worked. It happens that I had created a function name mean I just renamed it and restart the program.
Thanks for your help.

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