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Re: Array element deletion [message #36380]

Sat, 13 September 2003 10:05

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Edd Edmondson wrote:

> Supposing I have a big array and I also have an array containing indices
> of unwanted elements. Is there a neat way of removing those elements from
> the array?
>
> Attempts using WHERE() have failed for me* and currently I'm looping
> through the array of indices and deleting them one at a time - which is
> fine when I've only got 20 or 30 of them but I doubt it'll scale well.
>
>
> * - I tried to make a list of indices that I wanted to keep using
> WHERE(indgen(x) ne unwanted) but that only produces the first
> n_elements(unwanted) of the correct indices.
>

Just in addition to Davids answer.

a_not_b
http://www.fz-juelich.de/icg/icg-i/idl_icglib/idl_source/idl _html/dbase/a_not_b_dbase.pro.html

regards
Reimar

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Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
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[Message index]

		Re: Array element deletion By: R.Bauer on Sat, 13 September 2003 10:05
		Re: Array element deletion By: Edd Edmondson on Fri, 12 September 2003 06:44
		Re: Array element deletion By: David Fanning on Fri, 12 September 2003 06:31
		Re: Array element deletion By: jjbezair on Fri, 12 September 2003 06:27
		Re: Array element deletion By: Edd Edmondson on Fri, 12 September 2003 06:19

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