a test to exclude inf and nans from pinv(...) doesn't work

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 !

Answer 1

[Walter Roberson]

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.

[genevois pierre]

thank you : it works now !