Re: [Numpy-discussion] Multiplying list of matrices with list of vectors

2010-09-30 Thread David Reichert
Hi, Thanks for the tip. For small matrices this method seems to be faster, however, for matrices of the size I'm using it actually seems to be slower than simply looping... Regards, David On Wed, Sep 29, 2010 at 9:34 PM, Charles R Harris wrote: > > > On Wed, Sep 29, 2010 at 1:03 PM, David Reic

Re: [Numpy-discussion] Multiplying list of matrices with list of vectors

2010-09-29 Thread Charles R Harris
On Wed, Sep 29, 2010 at 1:03 PM, David Reichert wrote: > Hi, > > I have a list of matrices W_k I'd like to multiply with a list of vectors > v_k, > or another way of looking at it, writing all W_k into a 3d array and all > v_k into a 2d matrix/array, I'd like to compute matrix R as > > R_ik = sum_

[Numpy-discussion] Multiplying list of matrices with list of vectors

2010-09-29 Thread David Reichert
Hi, I have a list of matrices W_k I'd like to multiply with a list of vectors v_k, or another way of looking at it, writing all W_k into a 3d array and all v_k into a 2d matrix/array, I'd like to compute matrix R as R_ik = sum_j W_ijk h_jk. Is there a fast way of doing that in numpy? Regards,