MATLAB: Quick way to change complex number into NaN

complex

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!

Best Answer

A(imag(A)~=0) = nan;

Related Solutions

MATLAB: Replace a number in a matrix depending on neighbor numbers

It is unclear if elements connected diagonally count as neighbours. If not, then you could try something like this.

%%Work with At to keep A intact
At=A;
%%Replace NaN with some number
At(isnan(At))=9;
%%B is for saving index of new NaNs
B=zeros(size(At));
%%Find sequences of [2 NaN] and [NaN 2] row-wise
for i=1:size(At,1)
B(i,strfind(At(i,:),[9 2])+1)=NaN;
B(i,strfind(At(i,:),[2 9]))=NaN;
end
%%Transpose A and repeat (same as column-wise)
At=At';
for i=1:size(At,2)
B(strfind(At(i,:),[9 2])+1,i)=NaN;
B(strfind(At(i,:),[2 9]),i)=NaN;
end
A(isnan(B))=NaN

ans =

   NaN   NaN   NaN   NaN   NaN   NaN   NaN
   NaN   NaN   NaN   NaN   NaN   NaN   NaN
   NaN   NaN     1     1     1   NaN   NaN
   NaN   NaN     1     2     1   NaN   NaN
   NaN   NaN     1     1     1   NaN   NaN
   NaN   NaN   NaN   NaN   NaN   NaN   NaN
   NaN   NaN   NaN   NaN   NaN   NaN   NaN

MATLAB: Ignoring [NaN; NaN]

if all(isnan(A))
   A = B;
elseif all(isnan(B))
   B = A;
end
%proceed with A and B

Best Answer

Related Solutions

MATLAB: Replace a number in a matrix depending on neighbor numbers

MATLAB: Ignoring [NaN; NaN]

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