David Koch wrote: > Hi, > > I ran some tests on the very same matrices in Matlab/Numpy and it seems > that > for sparse matrix multipilcation to be faster than dense multiplication - > the degree of sparsity has to be much higher in Numpy than in Matlab. Is > there anything I can tune in the underlying routines? I need good > performance at about 0.02 +- 0.01 nnz elements.
Hi David, Could you be more specific on which type of the sparse matrix storage did you use? They are not equivalent in performance w.r.t. different aspects, e.g. LIL, DOK matrices a good for populating an empty sparse matrix, while CSR, CSC should be used for computations. r. _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
