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Re: Array Concatenation? [message #80747 is a reply to message #80743]

Fri, 29 June 2012 07:46

lecacheux.alain
Messages: 325
Registered: January 2008

Senior Member

On 29 juin, 13:02, rj...@le.ac.uk wrote:
> Hi
>
> I have two 4 dimensional arrays like so:
>
> Array[480, 241, 60, 124]
>
> The 4th dimension (124 elements) is time. I want to concatenate the 1st timestep for the second array to the first array, something like this:
>
> new=[array1, array2[*, *, *, 0]]
>
> But I can't get the syntax correct to do the concatenation on the 4th dimension.
>
> Any ideas what I'm doing wrong? I've tried various levels of []'s but can't get it working.
>
> Cheers
>
>

IDL concatenates arrays over the first dimension by using [array1,
array2] construct.
To achieve concatenation in your case, you might transpose your arrays
first, then transpose the result back, as follows:

new = transpose([transpose(array1), (transpose(array2))[0,*,*,*])

The second array must be transposed before you select last column
elements to avoid implicit elimination by IDL of the last dimension in
array2[*,*,*,0].

alain.

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[Message index]

		Re: Array Concatenation? By: Heinz Stege on Fri, 29 June 2012 11:16
		Re: Array Concatenation? By: lecacheux.alain on Fri, 29 June 2012 07:46
		Re: Array Concatenation? By: rjp23 on Wed, 11 July 2012 02:10

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