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How can I speed my function?

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zaier xiang
zaier xiang el 22 de Abr. de 2017
Editada: zaier xiang el 27 de Abr. de 2017
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 .

Respuesta aceptada

Andrew Newell
Andrew Newell el 22 de Abr. de 2017
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.

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