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Dealing with Large data arrays, reducing memory and ASSOC [message #54468]

Thu, 14 June 2007 05:33

Ambrosia_Everlovely is currently offline

Ambrosia_Everlovely
Messages: 2
Registered: June 2007

Junior Member

Hi,
I have a fairly large datacube, DC(x,y,t)=DC(512,512,2048) and I want
to perform an FFT in the t direction. Now I can do,
FFTDC=fft(DC,-1,dim=3) which takes an excessive amount of memory (19 G
+ 50 G virtual) and slows the whole system down.
Since this must be a fairly common practice amongst astronomers, can
anyone provide - or link to - a small IDL algorithm which will allow
me to use ASSOC or reduce the memory in some way? I have also tried
TEMPORARY, but this doesn't seem to help at all.

Thankyou!!!!

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