Delete/remove entire rows and columns containing an element that satisfies a condition (e.g. when the element is an imaginary number)

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Saeid
Saeid on 16 Jul 2021
Answered: Walter Roberson on 16 Jul 2021
In an array containing elements that are imaginary numbers, how can I remove the entire row(s) and column(s) containing any of these numbers?

Accepted Answer

Jonas
Jonas on 16 Jul 2021
Edited: Jonas on 16 Jul 2021
where=yourMatrix==yourCondition;
yourMatrix(any(where,2),:)=[];
yourMatrix(:,any(where,1))=[];
or
[row,col]=find(where);
yourMatrix(row,:)=[];
yourMatrix(:,col)=[];
if your condition being a complex number you can use where=~isreal(yourMatrix)

More Answers (1)

Walter Roberson
Walter Roberson on 16 Jul 2021
valgood = imag(YourMatrix)==0;
rowmask = all(valgood,2);
colmask = all(valgood,1);
newMatrix = YourMatrix(rowmask, colmask);

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