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Re: Generally accessing the rest of the elements in an array [message #23781 is a reply to message #23777]

Tue, 20 February 2001 16:12

thompson
Messages: 584
Registered: August 1991

Senior Member

"tbowers" <tbowers@nrlssc.navy.mil> writes:

> How do I access the 2nd + dimensions of an array generally, without knowing
> the
> number of higher dims this array has. E.g. say a is a 3 column by
> n-dimensional
> aray, and n is unknown. Here, I'll define it as:

> a = indgen(3,2,4)

> I want the equivalent of (in this case):
> b = (a[0,*,*])^2 + (a[1,*,*])^2 + (a[2,*,*])^2

(rest deleted)

You should be able to do something like the following:

b = a[0,*,*,*,*,*,*,*]^2 + a[1,*,*,*,*,*,*,*]^2 + a[2,*,*,*,*,*,*,*]^2

even though A might not have so many dimensions. With your above example, you
would then get

IDL> help,b
B INT = Array[1, 2, 4]

William Thompson

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[Message index]

		Re: Generally accessing the rest of the elements in an array By: Jaco van Gorkom on Wed, 21 February 2001 09:50
		Re: Generally accessing the rest of the elements in an array By: Paul van Delst on Wed, 21 February 2001 05:55
		Re: Generally accessing the rest of the elements in an array By: Jaco van Gorkom on Wed, 21 February 2001 06:21
		Re: Generally accessing the rest of the elements in an array By: thompson on Tue, 20 February 2001 16:12

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