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Re: drop array elements [message #21471 is a reply to message #21461]

Fri, 25 August 2000 00:00

John-David T. Smith is currently offline

John-David T. Smith
Messages: 384
Registered: January 2000

Senior Member

Matthew Kay wrote:
>
> Hi,
>
> Would anyone have any suggestions for an easy way
> to drop elements in an array? For example, say 'a'
> is a 14x1024 array and 'b' is a 1x25 array of row
> indicies in 'a' that should be dropped. Is there
> a simple command for re-assigning 'a', without the
> 25 rows indicated in 'b'?
>
> Much thanks,
> Matt

a=a[*,where(histogram(b,MIN=0,MAX=(size(a,/DIMENSIONS))[1]-1 ,BINSIZE=1) eq 0)]

The real meat here is finding a list of indices which do not contain the
elements of b. There are many ways to do this, but this is a fast one.

JD

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Cornell University Dept. of Astronomy \*/ (607) 255-5842
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[Message index]

		Re: drop array elements By: Craig Markwardt on Fri, 25 August 2000 00:00
		Re: drop array elements By: davidf on Fri, 25 August 2000 00:00
		Re: drop array elements By: Liam E. Gumley on Fri, 25 August 2000 00:00
		Re: drop array elements By: davidf on Fri, 25 August 2000 00:00
		Re: drop array elements By: John-David T. Smith on Fri, 25 August 2000 00:00

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