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

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genevois pierre
genevois pierre 2018-9-26
评论： genevois pierre 2018-9-26
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 !

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采纳的回答

Walter Roberson
Walter Roberson 2018-9-26
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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