MATLAB: Removing cells containing Inf or NaNs

cell arrays

Hi folks. I have a cell array, each cell containing a column vector. Is there any way to check if a cell contains inf or nans and if so deleting them? I.e if cell{3}=[inf;inf;1;2] then i want to remove it.

Thanks.

Best Answer

YourCellArray( cellfun( @(C) any(isnan(C) | isinf(C)), YourCellArray ) ) = [];

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z(cellfun('isempty',z))=[]

MATLAB: Are Infs still faster than NaNs

Hmmm, possibly a false alarm. In the tests below, minimization operations involving NaNs are still noticeably slower,

    n=1e4;k=1e4;
    A=rand(n,k);b=randi(k,n,1);
    idx=bsxfun(@lt,b,(1:k));
    A(idx)=nan;
    tic
    c=min(A,[],2);
    toc
    %Elapsed time is 0.348245 seconds.
    A(idx)=inf;
    tic
    c=min(A,[],2);
    toc
    %Elapsed time is 0.126220 seconds.

Still, I seem to remember that a lot of other operations were slower, too.

Best Answer

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