[Numpy-discussion] Overloading sqrt(5.5)*myvector
Gary Ruben
gruben@bigpond.net...
Wed Dec 26 04:49:38 CST 2007
Sorry this isn't an answer, just noise, but for those here who don't
know, Bruce is the chief maintainer of the vpython project. I have found
vpython aka the visual module to be a highly attractive and useful
module for teaching physics. It would be great if someone with Boost
experience would try to help him out. I wouldn't want him to get falsely
disillusioned with this list as I for one have been looking forward to a
fully numpy-compatible version of vpython.
Gary R.
Bruce Sherwood wrote:
> Sorry to repeat myself and be insistent, but could someone please at
> least comment on whether I'm doing anything obviously wrong, even if you
> don't immediately have a solution to my serious problem? There was no
> response to my question (see copy below) which I sent to both the numpy
> and Boost mailing lists.
>
> To the numpy experts: Is there something wrong, or something I
> could/should change in how I'm trying to overload multiplication of a
> numpy square root (or other numpy function) times my own "vector"
> object? I'm seeing a huge performance hit in going from Numeric to numpy
> because Numeric sqrt returned float whereas numpy sqrt returns
> numpy.float64, so that the result is not one of my vector objects. I
> don't have a problem with myvector*sqrt(5.5).
>
> Desperately,
>
> Bruce Sherwood
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