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Re: Avoiding loop in stats [message #52148 is a reply to message #52147]

Sun, 21 January 2007 05:11

yp
Messages: 42
Registered: February 2005

Member

On Jan 19, 8:26 pm, FÖLDY Lajos <f...@rmki.kfki.hu> wrote:
> Some speedup can be achieved with optimized memory access (if you have
> enough memory for two copies of data):
>
> temp=transpose(data, [2,0,1])
> for j=0l,2000l-1 do for i=0l,4000l-1 do data_st[i,j]=st_func(temp[*,i,j])
>
> regards,
> lajos- Hide quoted text -- Show quoted text -

Thanks Lajos,
It does improve the speed by >35%. Quite useful :)
btw is it necessary to copy data into temp var? I did not see any
difference when I overwrote data with transposed data.
--yas

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		Re: Avoiding loop in stats By: Foldy Lajos on Sun, 21 January 2007 08:01
		Re: Avoiding loop in stats By: yp on Sun, 21 January 2007 05:11

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