Problem with the mean function
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Hi everyone,
I've got a little pb with the 'mean' function :
My matrix has a class 'double' on my workspace : <70080*1 double> I would like to do an average of those values :
moyenne = mean(refoulement(1:8760,1)) and the answer is NaN. The values are positives.
Do you have an idea ?
Thanks !
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Accepted Answer
Kye Taylor
on 2 May 2012
Try this
meanWithoutNans = mean(refoulement(~isnan(refoulement)));
2 Comments
Kye Taylor
on 2 May 2012
I interpret you question as, "How do I take the mean of rows in a matrix and avoid the nans?"
To do that, try
meanOfRowsWithoutNans = zeros(size(refoulement,1),1);
for i = 1:size(refoulement,1) % for each row
meanOfRowsWithoutNans(i) = ...
mean(refoulement(i,~isnan(refoulement(i,:))));
end
More Answers (3)
Image Analyst
on 2 May 2012
What does this say:
hasNans = max(isnan(refoulement))
I want to see if there are any nan's in your original matrix.
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Sean de Wolski
on 2 May 2012
If you have the Stats Toolbox, take a peak at:
doc nanmean
Also this FEX submission:
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