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

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

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

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,

Re: [Numpy-discussion] defmatrix move and unpickling of old data

sn't enough. Cheers David On Sat, Apr 3, 2010 at 8:13 PM, David Reichert wrote: > Hi, > > After some work I got an optimized numpy compiled on a machine where I > don't > have root access, but I had to use numpy 1.4.0 to make it work. Now I have > the problem that I

[Numpy-discussion] defmatrix move and unpickling of old data

Hi, After some work I got an optimized numpy compiled on a machine where I don't have root access, but I had to use numpy 1.4.0 to make it work. Now I have the problem that I cannot seem to unpickle data I had created using numpy 1.3, getting an ImportError about defmatrix not being found. I unde

Re: [Numpy-discussion] Memory leak in signal.convolve2d? Alternative?

these things. Maybe other people can confirm the problem one way or another. Thanks, David On Tue, Mar 9, 2010 at 9:32 PM, wrote: > On Tue, Mar 9, 2010 at 4:24 PM, David Reichert > wrote: > > Hm, upgrading scipy from 0.7.0 to 0.7.1 didn't do the trick for me (still > > runni

Re: [Numpy-discussion] Memory leak in signal.convolve2d? Alternative?

Hm, upgrading scipy from 0.7.0 to 0.7.1 didn't do the trick for me (still running numpy 1.3.0). I'm not sure if I feel confident enough to use developer versions, but I'll look into it. Cheers David On Tue, Mar 9, 2010 at 7:57 PM, Robert Kern wrote: > On Tue, Mar 9, 20

[Numpy-discussion] Memory leak in signal.convolve2d? Alternative?

Hi, I just reported a memory leak with matrices, and I might have found another (unrelated) one in the convolve2d function: import scipy.signal from numpy import ones while True: scipy.signal.convolve2d(ones((1,1)), ones((1,1))) Is there an alternative implementation of a 2d convolution? O

Re: [Numpy-discussion] Memory leak with matrices?

Thanks for the reply. Yes never mind the second issue, I had myself confused there. Any comments on the memory leak? On Tue, Mar 9, 2010 at 5:55 PM, wrote: > On Tue, Mar 9, 2010 at 12:31 PM, David Paul Reichert > wrote: > > Hi, > > > > I've got two issues: > > > > First, the following seems t