[Numpy-discussion] invert() with complex arrays

Konrad Hinsen hinsen at cnrs-orleans.fr
Wed Aug 29 09:13:52 CDT 2001


> > > Is there any way to get invert() to work with complex arrays?
> > 
> > If you mean LinearAlgebra.inverse(), it should work with complex arrays,
> > although I haven't checked that for a long time.
>
> I tested a small matrix and got an error, but I will try again, since
> with my luck it was singular :)

No need to take chances:

   >>> from Numeric import *
   >>> from LinearAlgebra import inverse
   >>> a = 1.j*array([[1., 0.], [0., 1.]])
   >>> a
   array([[ 0.+1.j,  0.+0.j],
	  [ 0.+0.j,  0.+1.j]])
   >>> inverse(a)
   array([[ 0.-1.j,  0.+0.j],
	  [ 0.+0.j,  0.-1.j]])

So it works for at least one complex matrix. :-)

Konrad.
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