Re: CUDADot[] does not work with rectangular matrices

*To*: mathgroup at smc.vnet.net*Subject*: [mg115512] Re: CUDADot[] does not work with rectangular matrices*From*: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>*Date*: Thu, 13 Jan 2011 03:26:35 -0500 (EST)*References*: <igis8j$pne$1@smc.vnet.net>

Same here. In addition to this, I also found that at least some CUDA functions don't like rationals for input. CUDAImageConvolve[img, {{-1, 1, 1}, {-2, 0.1, 2}, {-1, 1, 1}}] works but CUDAImageConvolve[img, {{-1, 1, 1}, {-2, 1/10, 2}, {-1, 1, 1}}] doesn't (with img some kind of image) Cheers -- Sjoerd On Jan 12, 1:22 am, Koslicki <kosli... at math.psu.edu> wrote: > It seems like CUDADot[] does not work with rectangular matrices. For > example: > > In[80]:= Dot[{{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4}}, > {125,25,5,1}] > Out[80]= {194,194,194,194,194} > > Yet > > In[81]:= CUDADot[{{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4}}, > {125,25,5,1}] > During evaluation of In[81]:= CUDADot::invdim: CUDALink encountered an > object with invalid dimensions. >> > Out[81]= CUDADot[{{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4},{1,2,3,4}}, > {125,25,5,1}] > > So unless the first matrix is square with the same dimensions as the > vector, CUDADot[] will not work. > > Has anyone else come across this and/or found a workaround? > > Thanks, > > ~David