FOR loop standard deviation of multiple images

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Megan Wang
Megan Wang 2017-7-20
I want to construct a FOR loop to calculate the standard deviations of multiple images all stored within one 4x5 matrix. Then I would like the standard deviations to be stored within the vector B. I keep getting an error message and the code I have right now is:
if true
for E = 1 : 5
for D = 1 : 4
B(1i) = std2(ca{D,E});
end
end
% code
end

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