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Re: Search single column of array - removing nasty loop [message #78553 is a reply to message #78552]

Tue, 29 November 2011 03:40

greg.addr
Messages: 160
Registered: May 2007

Senior Member

I think this should be better...

q=where(array eq 0)
qq=array_indices(array,q)
for i=0,n_elements(q)-1 do array[qq[0,i],qq[1,i],qq[2,i],*]=0

If you often have many zeros in a single 4th-dim column, then it may be faster to check that the qq rows are unique before you make the loop.

Greg

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[Message index]

		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Thu, 01 December 2011 04:46
		Re: Search single column of array - removing nasty loop By: rjp23 on Thu, 01 December 2011 04:10
		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Thu, 01 December 2011 04:00
		Re: Search single column of array - removing nasty loop By: rjp23 on Thu, 01 December 2011 02:37
		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Wed, 30 November 2011 12:15
		Re: Search single column of array - removing nasty loop By: rjp23 on Wed, 30 November 2011 01:34
		Re: Search single column of array - removing nasty loop By: Heinz Stege on Tue, 29 November 2011 09:53
		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Tue, 29 November 2011 04:49
		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Tue, 29 November 2011 04:40
		Re: Search single column of array - removing nasty loop By: greg.addr on Tue, 29 November 2011 03:40
		Re: Search single column of array - removing nasty loop By: Yngvar Larsen on Thu, 01 December 2011 04:44

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