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Re: Avoiding loop stats [message #52144 is a reply to message #52142]

Mon, 22 January 2007 08:29

MarioIncandenza
Messages: 231
Registered: February 2005

Senior Member

I'm missing something. You are working with a FLTARR(4000,2000,900) on
Windows? That is >10x the size of the largest array I can create in IDL
under Windows or Linux. Is this 64-bit IDL? for Windows?

yp wrote:
> IDL Gurus,
> There is perhaps a smart solution to this problem, but I could not
> figure out.
> I have a series of EO images (2D) stacked over time which makes the
> data a 3D array of [4000, 2000, 900] i.e., [lon,lat,time]
> I need to compute various statistical parameters at each pixel over
> time and produce each of them as [4000,2000] array.
>
>
> for i=0,4000L-1 do for j=0,2000L-1 do data_st(i,j)=st_func(data(i,j,*))
>
> where, data=FLTARR[4000,2000,900]
> data_st is the output from a function 'st_func' which works with vector
> data only.
>
> Is there a way to do this avoiding the 4000x2000 loop? It is painfully
> slow on windows.
> thanks in advance

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[Message index]

		Re: Avoiding loop stats By: Jean H. on Mon, 22 January 2007 09:20
		Re: Avoiding loop stats By: MarioIncandenza on Mon, 22 January 2007 08:29
		Re: Avoiding loop stats By: Foldy Lajos on Fri, 19 January 2007 12:26
		Re: Avoiding loop stats By: yp on Fri, 19 January 2007 19:07
		Re: Avoiding loop stats By: news.qwest.net on Fri, 19 January 2007 12:00
		Re: Avoiding loop stats By: JD Smith on Fri, 19 January 2007 10:11

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