[Numpy-discussion] matrix multiplication A x, x has some zeros

dmitrey dmitrey.kroshko@scipy....
Fri Dec 14 02:24:50 CST 2007


Hi all,
I have to get Ax, A  is n x n matrix, x is vector of length n.
Some coords of x are zeros, so I want to economy time/cputime somehow 
w/o connecting sparse module from scipy.
What's the easiest way to do so?

Thx, D.


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