[Numpy-discussion] Construct a large n-dimensional complex matrix

Jochen Schroeder cycomanic@gmail....
Tue Apr 7 19:10:08 CDT 2009


On 06/04/09 21:20, Robert Kern wrote:
> On Mon, Apr 6, 2009 at 20:53, Nathan Faggian <nfaggian@unimelb.edu.au> wrote:
> > HI,
> > I want to construct a large complex matrix, I have the real and imaginary
> > components as double vectors, is there a fast way to construct a complex
> > vector in numpy?
> 
> C = np.empty((n,m), dtype=complex)
> C.real.flat[:] = real_values
> C.imag.flat[:] = imag_values
> 
Just a question, is there any advantage to doing 
C = 1.j *imag_values + real_values
?

Cheers
Jochen
> -- 
> Robert Kern
> 
> "I have come to believe that the whole world is an enigma, a harmless
> enigma that is made terrible by our own mad attempt to interpret it as
> though it had an underlying truth."
>   -- Umberto Eco
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