squeeze function returning "NaN"

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Julia Laing
Julia Laing 2022-4-5
评论： Julia Laing 2022-4-6
Hello everyone,
I'm trying to run a correlation between a 8, 8, 33 matrix (FC_mat) and a 33, 1 matrix, therefore, I'm trying to use the 'squeeze' function on the 8, 8, 33 matrix:
for regNum1=1:8;
for regNum2=1:8;
input1=FC_mat(regNum1,regNum2,:);
FC_mat_squeeze=squeeze(input1);
end
end
"FC_mat_squeeze=squeeze(input1);" is returning a 33, 1 matrix of all "NaN". There are NaN values along the diagonal of the "FC_mat" matrix.
I appreciate any insight any of y'all might have on getting the squeeze function to ignore the NaN's in the input.
Thanks!

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回答（1 个）

Paul
Paul 2022-4-6
squeeze() can't ignore anything. If the input to squeez() is 1 x 1 x 33 matrix of NaN, the ouptut will be 33 x 1 of NaN. What is the desired result if input1 is 1 x 1 x 33 of NaN?
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Paul
Paul 2022-4-6
The only ways that come to mind would be to replace the NaN's with actual numbers, or modify the loops so as not to process those elements, or to detect the NaN's and skip that processing, like this:
for regNum1=1:8;
for regNum2=1:8;
input1=FC_mat(regNum1,regNum2,:);
FC_mat_squeeze=squeeze(input1);
if ~any(isnan(FC_mat))
% process valid data
end
end
end
Julia Laing
Julia Laing 2022-4-6
Thanks for those recommendations. Adding in the line to detect the NaN's and skip that processing is still giving me an output of all NaN's. I'll keep trying to mess with things to work around this issue.
Thanks for your help!

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