How do I replace/convert all zeros in 3rd-dimension to NaN

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NA 2020-9-5

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评论： NA 2020-9-5

Hi All,

I have a 5-D matrix: 5x16x20x3x15, where 5x16 is the data set; 20 is the number of trials (per experiment); 3 is the number of experiments (per participant); and 15 is the number of participants. If I had 1 particant that had a dataset (for only one exp) that was exclusively all zeros i.e. 5x16x20x2x2 was entirely zeros; would there be a way to convert the zeros to NaN, so that my mean and std calculations are not affected?

Cheers.

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采纳的回答

David Hill 2020-9-5

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在 MATLAB Online 中打开

yourMatrix(:,:,affectedTrials,affectedExperiment,affectedParticipant)=nan;

If all trials of the affected experiment are zeros, then:

yourMatrix(:,:,:,2,2)=nan;

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David Hill 2020-9-5

在 MATLAB Online 中打开

If your matrix is not too large, this will work fine.

for k=1:size(yourMatrix,3)
  for n=1:size(yourMatrix,4)
    for m=1:size(yourMatrix,5)
      if nnz(yourMatrix(:,:,k,n,m))==0
        yourMatrix(:,:,k,n,m)=nan;
      end
    end
  end
end