Ttest function with random numbers

Question

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Hi all,

I have the following problem with the ttest function:

[h, p, ci, stats] = ttest(randn(10,1), randn(10,1), 0.05)

Undefined function or variable 't'.

Error in nanmean (line 7) N = sum(~isnan(t), dim);

Error in ttest (line 131) xmean = nanmean(x,dim);

Anyone knows how to deal with this? Doesn't seem to be related to structure (tried squeeze).

Best regards,

Christian

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Answer 1

the cyclist 2014-11-16

0 个投票

My best guess is that you have inadvertently defined your own ttest function. What do you get if you type

which -all ttest

?

Eric 2014-11-17

编辑：Eric 2014-11-17

When I type 'which -all ttest' I only get a reference to the matlab function:

>> which -all ttest /Applications/MATLAB_R2013b.app/toolbox/stats/stats/ttest.m

The problem was somehow related: Matlab picked up a different nanmean function I had in my path.

Thank you for the help!