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Re: Array indexing problem [message #37848]

Thu, 29 January 2004 15:21

kashyap
Messages: 26
Registered: April 1993

Junior Member

In article <MPG.1a81e83474fc47e19897be@news.frii.com>,
David Fanning <david@dfanning.com> wrote:
> Michael Wallace writes:
>
> Maybe we can hear from someone who uses it.
>
> Cheers,
>
> David

I use this feature quite a lot, for instance, to
define an array of a different size using a set
of indices where said indices may overflow (happens
all the time), and all I may want at these overflow
points is some default value.

Example: suppose there is an array of element
abundances (say ABUND, with size 30). And a
set of indices indicating the atomic number
(say Z, of size 10386). I want to make a new
array (AZ, of size 10386) which contains the
abundances for each of the Z[i]. Now further
suppose that in some places Z may be 0 or -1,
and for which I simply want to set the abundance
to 1. There are no doubt other ways of doing
this, but AZ=ABUND[Z-1] works fast, transparently,
AND stays readable.

Vinay
--
____________________________________________________________ __________________
kashyap@head-cfa.harvard.edu 617 495 7173 [CfA/P-143] 617 496 7173 [F]

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[Message index]

		Re: Array indexing problem By: kashyap on Thu, 29 January 2004 15:21
		Re: Array indexing problem By: David Fanning on Thu, 29 January 2004 09:58
		Re: Array indexing problem By: Liam Gumley on Thu, 29 January 2004 09:43
		Re: Array indexing problem By: roberson_1 on Thu, 29 January 2004 09:03
		Re: Array indexing problem By: hunter on Wed, 28 January 2004 13:43
		Re: Array indexing problem By: Mark Hadfield on Wed, 28 January 2004 16:55
		Re: Array indexing problem By: David Fanning on Wed, 28 January 2004 14:40
		Re: Array indexing problem By: Paul Van Delst[1] on Wed, 28 January 2004 14:28
		Re: Array indexing problem By: Michael Wallace on Wed, 28 January 2004 14:23
		Re: Array indexing problem By: Liam Gumley on Wed, 28 January 2004 14:11
		Re: Array indexing problem By: David Fanning on Wed, 28 January 2004 13:34

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