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Asked by Dusan Kojic
on 15 Dec 2012

I'm trying to use 'mvregress' function to fit Y matrix (3400x9) of dependent variables, using X matrix of observations (3400(observations) x 900 (variables)).

Y matrix has a lot of 0s, but otherwise all positive numbers between 0.7 and 1300.

When I type beta = mvregress(X,Y)

I get the error message: ??? Undefined function or method 'isnan' for input arguments of type 'cell'.

Error in ==> mvregress at 238 if isempty(EstMethod) && ~any(isnan(Data(:)))

What am I doing wrong or how can I overcome this ?

Thanks a lot ! Dusan

Answer by Shashank Prasanna
on 12 Jan 2013

From the error it appears that the X or Y or both may be cell instead of matrices. You can verify that by using class as Walter mentioned or running the >>whos command. Convert them to matrices by using cell2mat http://www.mathworks.com/help/matlab/ref/cell2mat.html

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## Walter Roberson

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/56649#comment_117346

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