MATLAB: A test to exclude inf and nans from pinv(…) doesn’t work

infMATLABnanpinv

Hello,
having this error :
     Error using svd
     Input to SVD must not contain NaN or Inf.
     Error in pinv (line 29)
        [U,S,V] = svd(A,0);
I tried to add this test before calling pinv(gradVcpr) :
    if any(isnan(gradVcpr) | ~isfinite(gradVcpr))  % Error : gradVcpr is NaN or infinite
        ......
        return % stop executing the function before call to pinv
    end
But the test doesn't work : I still have the same error. Can somebody help me ?
Thank you !

Best Answer

if any(isnan(gradVcpr(:))) || any(~isfinite(gradVcpr(:))))
You were missing the fact that any() is a matrix operation that processes only the first non-scalar dimension. Your code was equivalent to
if all(any(isnan(gradVcpr) | ~isfinite(gradVcpr)))
but that was false for some of the columns so the all() failed.
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