[Numpy-discussion] Re: Numpy-discussion digest, Vol 1 #70 - 1 msg

Chris Myers myers at tc.cornell.edu
Sat Jun 24 18:58:45 CDT 2000


Michel Sanner wrote:

> I built Numeric on a Dec Alpha under OSF1 V4.0. I built fine but when I ran 
> it I witnessed strange behavior.
> 
> a = Numeric.identity(4)
> a.shape = (16,)
> 
> would raise an exception about the size of the array needing to remain 
> the same ???

I have seen the same behavior on a Dec Alpha running RedHat Linux,
with Numeric compiled with gcc.

The other random pieces of Numeric that I tried seemed to work
correctly.

Chris

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Chris Myers 
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On Sat, 24 Jun 2000 numpy-discussion-admin at lists.sourceforge.net wrote:

> Date: Sat, 24 Jun 2000 12:19:28 -0700
> From: numpy-discussion-admin at lists.sourceforge.net
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> Subject: Numpy-discussion digest, Vol 1 #70 - 1 msg
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> Today's Topics:
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>   1. Numeric on Dec Alpha (Michel Sanner)
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> --__--__--
> 
> Message: 1
> From: "Michel Sanner" <sanner at scripps.edu>
> Date: Fri, 23 Jun 2000 12:22:24 -0700
> To: numpy-discussion at lists.sourceforge.net
> Subject: [Numpy-discussion] Numeric on Dec Alpha
> 
> Hi, I posted this message on the python-list a while ago and did not hear
> anything .. so I try here :)
> 
> I built Numeric on a Dec Alpha under OSF1 V4.0. I built fine but when I ran it
> I witnessed strange behavior.
> 
> a = Numeric.identity(4)
> a.shape = (16,)
> 
> would raise an exception about the size of the array needing to remain the same
> ???
> 
> Using the debugger I found in arrayobject.c:2201
> 
>         if (PyArray_As1D(&shape, (char **)&dimensions, &n, PyArray_LONG) == -1)
> return NULL;
> 
> After this call shape [0] is 4 BUT shape[1] is 0 !
> 
> I changed the code to
>                   if (PyArray_As1D(&shape, (char **)&dimensions, &n,
> PyArray_INT) == -1) return NULL;
> 
> and got the right result.
> 
> Did anyone else run into this kind of preblems ? what is the correct way to fix
> that ?
> 
> thanks
> 
> -Michel
> 
> 
> -- 
> 
> -----------------------------------------------------------------------
> 
> >>>>>>>>>> AREA CODE CHANGE <<<<<<<<< we are now 858 !!!!!!!
> 
> Michel F. Sanner Ph.D.                   The Scripps Research Institute
> Assistant Professor			Department of Molecular Biology
> 					  10550 North Torrey Pines Road
> Tel. (858) 784-2341				     La Jolla, CA 92037
> Fax. (858) 784-2860
> sanner at scripps.edu                        http://www.scripps.edu/sanner
> -----------------------------------------------------------------------
> 
> 
> 
> 
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