Thanks Paul, I will try it out. That at least gives me some direction. I've been pouring over the Numpy manual, but there are so many different functions! I would like to try to write an extension that includes some of these FEM routines, but thats for later.

BTW, at work I have to use Windows NT, but I've grown to love the calldll/DynWin extension. You can even interact with the windows kernel with that one. Rob.

"Paul F. Dubois" wrote:

def cgqp(QuadPoint, TrngleNode, a): s = a.Qpnt[Quadpoint,:] c = Numeric.take(a.NodeCord, TrngleNode) return Numeric.add.reduce(s * c, axis=1)

This may or may not be right. The data structures I would have to set up to test it are too much for Sunday morning.

-----Original Message----- From: numpy-discussion-admin@lists.sourceforge.net [mailto:numpy-discussion-admin@lists.sourceforge.net] On Behalf Of Rob Sent: Sunday, August 26, 2001 8:39 AM To: numpy-discussion@lists.sourceforge.net. Subject: [Numpy-discussion] Can this function by Numpy-ized?

I finally got my FEM EM code working. I profiled it and this function uses up a big hunk of time. It performs gaussian integration over a triangle. I am trying to figure out how to slice the arrays so as to push it down into the C level. Does anyone have any ideas? Thanks, Rob.

ps. it looks to be intractible to me. Maybe I need to look at writing a C extension. I've never done that before.

##**********************************************************************

##Prototype: void ComputeGaussQuadPoint(int QuadPoint, int *a.TrngleNode, ## double *SrcPointCol) ##Description: To compute the coordinates of 7-point Gauss nodes of ## a triangular patch. ##Input value: ## int QuadPoint --- node index, it can be from 0 to 6. ## int *a.TrngleNode --- the three nodes of a tringular patch. ## double *SrcPointCol --- where to store the results ##Return value: none ##Global value used: a.NodeCord, a.Qpnt ##Global value modified: none ##Subroutines called: none ##Note: Not very sure.

def ComputeGaussQuadPoint(QuadPoint,TrngleNode,a):

`SrcPointCol=zeros((3),Float) SrcPointCol[0] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],0]\ + a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],0]\ + a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],0] SrcPointCol[1] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],1]\ + a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],1]\ + a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],1] SrcPointCol[2] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],2]\ + a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],2]\ + a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],2] return SrcPointCol`

-- The Numeric Python EM Project

www.members.home.net/europax

Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net http://lists.sourceforge.net/lists/listinfo/numpy-discussion

Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net http://lists.sourceforge.net/lists/listinfo/numpy-discussion