Hi,
On Sat, Mar 06, 2021 at 07:41:18PM +0000, Ed . wrote:
> Dear PDL folks,
> I have just uploaded PDL 2.027. Changes from 2.026:
Great!
I want to start using the new complex code, mostly to avoid the errors
due to bad uses of the extra (real-imag) dimension.
> - native support for complex numbers - thanks Ingo Schmid
> - define and use C macros in PP for shorter, more comprehensible XS
>
> Note that the native complex numbers are as defined in C99, and no attempt
> has (yet) been made to integrate this with PDL::Complex. Additionally, it’s
> not yet clear to me whether PDL performs better on complex numbers via
> PDL::Complex, or natively. Could someone more knowledgeable than me with PDL
> complex numbers (Luis?) come up with a benchmark, or at least a plausible,
> representative set of calculations to do with complex numbers so I can make a
> comparison?
Just to learn, I tried to mimic with complex numbers the Mandelbrot
oneliner from the demos. I found what I guess is a bug:
pdl> $a=1+ci
pdl> p $a
1+1i
pdl> p $a*$a
0+2i
pdl> p $a**2
1+0i
So powers of complex numbers are not working. I haven't looked yet at
the P::Ops code. I'll try later.
Anyway, thanks and regards,
Luis
--
o
W. Luis Mochán, | tel:(52)(777)329-1734 /<(*)
Instituto de Ciencias Físicas, UNAM | fax:(52)(777)317-5388 `>/ /\
Av. Universidad s/n CP 62210 | (*)/\/ \
Cuernavaca, Morelos, México | moc...@fis.unam.mx /\_/\__/
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