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Re: vectorization challenge! (help!) [message #54893 is a reply to message #54844]

Thu, 19 July 2007 09:40

alvin[1]
Messages: 4
Registered: July 2007

Junior Member

Hi there:

If I understand your problem truly, I would have done this:
The code is not efficient, and contains redundant values in the 'for'
loop.
With a little playing around, you can reduce the size of randindex in
the
loop. Hope this helps.

Alvin Das

n=24 ; How large is this value?
npeeps=50 ;How large is this?
gn1 = findgen(n,npeeps)
gn2=qn1

;;;;;cutoff = .01 ;;;; What does this do?

randindex = long(randomu(seed,npeeps)*n) ;;;;; I don't know
what 'nd'
is!

;;;if randomu(seed,1) lt cutoff then begin ?? ;;;;This is throwing
me
off...
;;;;What do you
intend to do
here?

thisval=n*indgen(npeeps)+n-1
for i=1,n do randindex=[randindex,(randindex+n-1)<thisval]
temp = gn1[randindex]
gn1[randindex] = gn2[randindex]
gn2[randindex] = temp

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[Message index]

		vectorization challenge! (help!) By: Conor on Tue, 17 July 2007 09:52
		Re: vectorization challenge! (help!) By: MarioIncandenza on Thu, 19 July 2007 10:56
		Re: vectorization challenge! (help!) By: alvin[1] on Thu, 19 July 2007 09:40
		Re: vectorization challenge! (help!) By: Brian Larsen on Thu, 19 July 2007 06:33
		Re: vectorization challenge! (help!) By: mattf on Thu, 19 July 2007 04:53
		Re: vectorization challenge! (help!) By: Maarten[1] on Thu, 19 July 2007 01:35
		Re: vectorization challenge! (help!) By: alvin[1] on Thu, 19 July 2007 01:01
		Re: vectorization challenge! (help!) By: Brian Larsen on Wed, 18 July 2007 13:37

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