Re: [LabPython-Users] Numpy and Scipy

[Luc E. <luc...@en...>]

Hi all,

I would like to add my vote to support the idea to add a numpy interface
for Labpython! This would enhance greatly this piece of software since
numpy has really become the standard for numerical stuff in python, and I
suppose many users of Labpython are using python as a 'matlab'
replacement.

Thank you for all the hard work,

Gratefully,

luc

> Hi Glen
>
> So numpy and scipy functions can be used as long as native data types are
> used?  That may cause some problems since I am trying to perform matrix
> operations.  I am using LabVIEW 8.20 with python 2.5.2 and labpython 1.2.2
> on Windows XP.  I am trying to pass a 2D array of floats to python.
>
> It should be possible. The way I solved arrays in LabPython was to treat
> them as lists. Consequently 2D arrays are lists of lists. It is not very
> efficient but Python does even in 2.5 not give you an exported array C API
> with which I could retrieve any information from a numpy array, despite
> the
> fact that the Python core does know an array datatype.
>
> It would be possible to add something like that to LabPython by making use
> of the numpy extension and its exported C API but at the time I was
> developing LabPython numpy was just in its infancy taking over from its
> predecessor the numerical library. That API seemed not at all stable to me
> at that point and making LabPython depend only softly on it (meaning it
> would still work but without support of numpy datatypes) would also be
> some
> serious thinkering.
>
> I may take a look how numpy interfaces with Python to solve the array
> interface issue but to do it right would be a majour undertaking and I
> have
> a real job to do that pays the bills.
>
> Rolf Kalbermatter
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