How can I speed my function?

the function is used to compute hoeffdingsD measure,but the performance of my function is poor. when i use it in my code ,it usually cost several days.who can help me ,or compile it .

Answer 1

[Andrew Newell]

One source of delays can be repmat. This can be replaced by a suitable choice of index, as in the following:

r = R(i,:);
r = r(ones(N,1),:);

See Matlab Indexing and Repmat Replacement for a discussion of this issue.

That said, it may be too much to expect a really fast implementation of this algorithm, judging by this discussion of the algorithm.

[zaier xiang]

thanks