How can I insert NaN value in a matrix?

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Ashfaq Ahmed
Ashfaq Ahmed 2021-11-30
编辑： dpb 2021-11-30
Ran in:
Suppose I have this matrix
a = [1:6; 7:12; 13:18; 19:24]
a = 4×6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
I want to fill the values for all the even number with NaN. How can I do it? For example, the first row of my matrix should look like:
a(1,:) = 1 NaN 3 NaN 5 NaN

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dpb
dpb 2021-11-30
编辑：dpb 2021-11-30
a(iseven(a))=nan; % iseven() is in Signal Processing TB
w/o the SP TB, it's not much more
a(~mod(a,2))=nan;
These are logical addressing/indexing expressions, one of the most powerful of all MATLAB syntax features. Look for and read section in the documentation on addressing matrices to learn more.

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