[Octave-bug-tracker] [bug #60786] mpower: negative scalar to power of matrix containing non-integers returns nan

[Rik]

Follow-up Comment #12, bug #60786 (project octave):

Next question is step 2 and moving the eigenvalue decomposition into OR out of
the try/catch block.  The error messages will be different.  Here is a sample
session to show those differences.


octave:14> mpower (-2, x)
error: Failed to diagonalize matrix while calculating matrix exponential
octave:15> mpower (-2, complex (x))
error: EIG: matrix contains Inf or NaN values


In the first case, the eig call is within the try/catch block.  In the second
case, it is outside the try/catch block.

Does anyone have a preference?  I sort of appreciate the extra specificity of
the error message from eig() when it fails.  In this case, I purposefully did
have a NaN value in the matrix 'x'.

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