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Re: Array manipulation [message #22306 is a reply to message #20371]

Thu, 02 November 2000 00:58

Martin Schultz
Messages: 515
Registered: August 1997

Senior Member

Leon Majewski wrote:
>
> Hello
> I was wondering whether any array minded person could suggest a way of using array
> indicies to chop up a large array into ordered windows.
> I can't think of a way to do it with reform, translate (though i'm sure this is my
> limitation not a reform translate limitation)
>
> ---------
> ie given an array of 30*30 elements
> return 100 3*3 elements
> or 36 5*5
> or...
>
> in=
>
> 00 01 02 03 04 05..
> 30 31 32 33 34 35..
> 60 61 62 63 64 65..
>
> out = blocks such as
> 00 01 02
> 30 31 32
> 60 61 62
>
> each block is then processed to one representative number (ie mean or median....) and
> returned
>
> ------------
> What i've used so far is attached below (it does what i want, just slowly)
> [snipped][/color]

For the extraction of subportions of an array you could try out my
arrex routine which you can find at
http://www.mpimet.mpg.de/~schultz.martin/idl/html/libmartin_ schultz.html
. It's fairly general, but I am not sure if it is the fastest for
extracting similar array portions over and over again.

Cheers,
Martin

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[Message index]

		array manipulation problem By: Martin B. Schmidt on Wed, 07 June 2000 00:00
		Re: Array manipulation By: Martin Schultz on Thu, 02 November 2000 00:58
		Re: Array manipulation By: Vince Hradil on Wed, 01 November 2000 13:42
		Re: Array manipulation By: Jaco van Gorkom on Wed, 01 November 2000 09:59
		Re: Array manipulation By: majewski on Fri, 03 November 2000 20:28
		Re: Array manipulation By: R.G.S. on Wed, 01 November 2000 09:44
		Re: Array manipulation By: John-David T. Smith on Wed, 01 November 2000 09:00

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