Sparse arrays on GPU?

Hello,

According to the Matlab documentation ( http://www.mathworks.com/help/distcomp/run-built-in-functions-on-a-gpu.html ), I can create a sparse gpuArray by "either by calling sparse with a gpuArray input, or by calling gpuArray with a sparse input." Neither of these seems to work:

x = sparse([0 2 0; 0 5 0; 0 1 0])

x =

   (1,2)        2
   (2,2)        5
   (3,2)        1

   m = gpuArray(x)
   Error using gpuArray
   Only full arrays of fundamental numeric types or logical types are supported for
   GPU arrays.

Or alternatively:

   x = gpuArray([0 2 0; 0 5 0; 0 1 0])

   x =

     0     2     0
     0     5     0
     0     1     0

   X = sparse(x)

   Undefined function 'sparse' for input arguments of type 'gpuArray'.

Am I doing something wrong?

Thanks!

Answer 1

[Matt J]

Make sure you are using a recent enough version of MATLAB. Sparse gpuArrays weren't always supported.

[Ajay Shenoy]

Which was the first version to support sparse gpuArrays? I have Matlab R2014b and version 6.5 of the parallel computing toolbox. Thanks - A.

[Walter Roberson]

R2015a. http://www.mathworks.com/help/distcomp/release-notes.html

Answer 2

[Amin zaami]

See example below for sparse on GPU:

sparse(41200,41200,gpuArray(1),41200,41200);

• first 2 arguments for size, last two for memory,