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Quick way to change complex number into NaN

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Qian
Qian 2012-11-13
If I have a matrix of A=[1 2 ; 2+i 3] I want to make it into A=[1 2; NaN 3] Is there anyway like using isnan function to do this? Thanx!

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Teja Muppirala
Teja Muppirala 2012-11-13
A(imag(A)~=0) = nan;

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