sometimes I get a warning : rank deficient

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William Campbell
William Campbell 2020년 3월 1일
댓글: William Campbell 2020년 3월 2일
sometimes I get a Warning: Rank deficient, rank = 0, tol = 0.000000e+00 and it points to an equation in a loop :
a = sqrt(abs(x/x-d))); where x and d are scalars
my results seem plausible, but should I be concerned about this warning ?
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William Campbell
William Campbell 2020년 3월 2일
Thanks for your fast response - it looks like I had updated my x variable further into my script and created a conflict. All sorted now. Thanks again.

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Matt J
Matt J 2020년 3월 2일
편집: Matt J 2020년 3월 2일
should I be concerned about this warning
If the line you've shown is what caused the warning, then it's likely x and d are not both scalars as you intended. You might need to be concerned about that.
Incidentally, this line looks like it should be,
a = sqrt( abs( x./(x-d) ) );

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