MATLAB: Selcting elements of a vector with index NOT in a specified index vector

find elements not having a specified indexMATLABvector

Hi,

This maybe a basic question but I am not abe to find an answer by googling. I have a vector , say A = [ 10 20 30 40 50 60 70] and another vector I = [1 3 5 7]. How do I elegantly find the elements of A whose indices do not match the elements of I? Thus, in this case I would like the answer to be [ 20 40 60].

Thanks a lot!

Best Answer

A(setdiff(1:numel(A),index))

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   B = A(setdiff((1:length(A)).’,index(:)));

or if you're sure A and index are row vectors just

   B = A(setdiff(1:length(A),index));

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Edit

n=size(B,1);
for k=1:n;
  ii=B(k,1)
  jj=B(k,2)
  A(ii:jj,:)=0;
end

Best Answer

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MATLAB: How to extract data from a vector based on index

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