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Match NaN's in one Matrix to another

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Robert
Robert 2016-2-24
回答： the cyclist 2016-2-24
Consider 2 matrices
A = [1, 2, 3, 4;
5, 6, 7, 8]
B = [NaN NaN 1 1;
NaN 1 1 NaN]
How can
C = [NaN NaN 3 4;
NaN 6 7 NaN]
I can do this for an individual row or column but can't get it to work for matrix. Thanks in advance for any help

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the cyclist
the cyclist 2016-2-24
C = A;
C(isnan(B)) = NaN

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