max function in gpu error

hello,

I want to use max function in arrayfun function.

I'm not familiar with using matlab in gpu.

My function is

[ maxv , dtree ]= arrayfun(@ GetRandomDecisionTree, rand_vec , rand_label , ClaNum , RandFnum , RandTnum , MinSampleNum , MaxDepth  ) ;

and in GetRandomDecisionTree function

function [ DTreeMaxVec DTrees ] = GetRandomDecisionTree( Vec , ClaLabel , ClaNum , RandFnum , RandTnum , MinSampleNum , MaxDepth )
DTreeMaxVec = max(Vec); 
end

Vec is matrix 50 * 500 size

but this code has error "Too few arguments supplied to: 'max'. (One supplied, two required.) "

I just want to get DTreeMaxVec 1*500 size, I don't want to use max(a,b).

help me please!

Answer 1

[Edric Ellis]

On the GPU, arrayfun supports only the elementwise version of min and max - i.e. the two input argument case. In this case, I think you'll need to call max outside your arrayfun invocation.

Answer 2

[Walter Roberson]

Which MATLAB release are you using? Before R2011b there were more limitations on gpu functions

[wonji sim]

I'm using R2011b.

um.. I have more question . I want to run the Random Forest Tree in gpu. But I confirm that structure is not supported in gpu. Error message is "Struct field access or indexing is not supported." Is it right?

[Walter Roberson]

gpu arrays must be numeric or logical, not structures. However a structure (not on the GPU) may contain a gpu array object.

I do not seem to find any documentation about max on GPU.