How to make a NaN vector if there is a single NaN in a column?

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Cnell 2020-7-28

评论： madhan ravi 2020-7-28

Say you have a vector

A= [ 2 4 6 8 NaN 10 12 14]

How do you make a NaN vector if and only if there is a NaN in one of the columnns:

A = [NaN NaN NaN NaN NaN... ]

madhan ravi 2020-7-28

 [m, n] = size(A);
 A = nan(m, any(isnan(A(:))) * n)

Cnell 2020-7-28

I thought the "if and only if" gave that away. Perhaps I should have been more clear, my apologies.

madhan ravi 2020-7-28

Sorry I’m not a mind reader:(

 ix = nan(m, any(isnan(A(:)))* n);
 if isempty(ix)
     A = A
 else
     A = ix
 end

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