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Re: Array index for arrays [message #28417 is a reply to message #28335]

Tue, 04 December 2001 18:40

air_jlin
Messages: 22
Registered: July 2001

Junior Member

Craig Markwardt <craigmnet@cow.physics.wisc.edu> wrote in message
news:<onr8qb6ok2.fsf@cow.physics.wisc.edu>...
> [...]
>
> Yes, this has burned me a couple of times. The short answer is that
> when you combine two or more "index lists", then they are treated as
> one-for-one coordinate lists. What you want can be achieved in two
> separate indexing steps:
>
but how come adding a third "*" dimension gives something you would
expect?

---------------------------------
IDL> z=indgen(3,2,4)
IDL> ix=[0,1]
IDL> print,z
0 1 2
3 4 5

6 7 8
9 10 11

12 13 14
15 16 17

18 19 20
21 22 23
IDL> print,z[ix,ix,*]
0 1
3 4

6 7
9 10

12 13
15 16

18 19
21 22
---------------------------------

thanks!

best,
-Johnny

-------------------------------------------
Johnny Lin
CIRES, University of Colorado
Work Phone: (303) 735-1636
Web: http://cires.colorado.edu/~johnny/
-------------------------------------------

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		Re: Array index for arrays By: Craig Markwardt on Tue, 04 December 2001 06:35
		Re: Array index for arrays By: air_jlin on Tue, 04 December 2001 18:40

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