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Re: array concatenation [message #58502 is a reply to message #48962]

Wed, 30 January 2008 08:21

Allan Whiteford
Messages: 117
Registered: June 2006

Senior Member

Ryan. wrote:
> Hi All,
>
> I'm trying to add a 1x2 array to the end of an Nx2 array to obtain a (N
> +1)x2 array using the square bracket concatenation trick, but based on
> my limited understanding of it, I can't get it to work. I've looked
> at JD's tutorial on David's website but I still don't get it.
>
> Here is an example of what I want to do:
> IDL> array = [[1,2,3,4],[1,2,3,4]]
> IDL> print, array
> 1 2 3 4
> 1 2 3 4
>
> I want to add another pair to the array to get this:
> 1 2 3 4 5
> 1 2 3 4 5
>
> I want to execute a command similar to this one but I can't figure out
> the correct number of brackets:
> array = [[array], [[5,5]]]
>
> Thanks,
> Ryan.

Ryan,

IDL> array = [[1,2,3,4],[1,2,3,4]]
IDL> array=transpose([[transpose(array)],[[5,5]]])
IDL> print,array
1 2 3 4 5
1 2 3 4 5

but probably there is a smarter way.

Thanks,

Allan

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[Message index]

		Array concatenation By: maye on Wed, 07 June 2006 03:41
		Re: Array concatenation By: Vince Hradil on Tue, 17 July 2007 09:25
		Re: Array concatenation By: Julio[1] on Tue, 17 July 2007 06:40
		Re: Array concatenation By: Conor on Tue, 17 July 2007 05:11
		Re: Array concatenation By: Paolo Grigis on Tue, 17 July 2007 00:28
		Re: Array concatenation By: Peter Clinch on Tue, 17 July 2007 00:24
		Re: array concatenation By: Wox on Thu, 31 January 2008 00:43
		Re: array concatenation By: Spon on Wed, 30 January 2008 08:38
		Re: array concatenation By: Allan Whiteford on Wed, 30 January 2008 08:21
		Re: array concatenation By: Karl[1] on Fri, 03 October 2008 18:11
		Re: array concatenation By: David Fanning on Fri, 03 October 2008 14:20
		Re: array concatenation By: lecacheux.alain on Fri, 03 October 2008 14:16
		Re: array concatenation By: Joost Aan de Brugh on Fri, 03 October 2008 08:15
		Re: array concatenation By: lecacheux.alain on Fri, 03 October 2008 04:19

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