[Pyublas] iterators/indexed access

[Janosch Peters]

Hi list,

my code runs pretty slow, so I'm looking for speed improvements. I
read in the docs that iterators should be used instead of indexed
access. But Im not really sure what counts as "indexed access". Is
there a way to speed the following code snippet up with iterators?


("numpy_matrix<double> data" is part of the method signature.)
---------------------------------------------------------------------------------------
matrix_row< numpy_matrix< double > > pointVec = row(data, pointId);
for(unsigned int i = 0; i < data.size1(); i++)
{
if(static_cast<unsigned int>(assignments(i)) == clusterId && i !=
pointId)
{
avDist += norm_2(row(data,i) - pointVec);
numPoints++;
}
}
---------------------------------------------------------------------------------------

cheers,
Janosch



Janosch Peters, BSc.
Brunnerstra?e 39
80804 M?nchen

[phone]
[phone]


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