Hello, I am trying to wright a variable directly on the GPU using the following command:

A5 = parallel.gpu.GPUArray.rand(3000,3000);

but I get the following error:

Undefined variable "parallel" or class "parallel.gpu.GPUArray.rand". I don't know why I get this error. I am using Matlab 2015b. Could someone help me?

Answer 1

[Jan]

Do you have the Parallel Processing Toolbox installed and licensed? Check this by the ver command.

[FRANCESCO DE VIVO]

yes, I have : Parallel Computing Toolbox Version 6.6

Answer 2

[Edric Ellis]

That's the old syntax from R2011a or so. In R2015b, you can do simply:

A5 = rand(3000, 3000, 'gpuArray');

(The direct equivalent is gpuArray.rand(3000,3000)).

[FRANCESCO DE VIVO]

yes but this way you are passing from CPU to GPU, is it wright? My goal is to create directly the variable on the GPU saving time avoiding the passage

[Sean de Wolski]

Both of these create the array directly on the GPU.