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Re: REVERSE even row elements in data array. [message #12471 is a reply to message #12470]

Mon, 03 August 1998 00:00

Kevin Ivory
Messages: 71
Registered: January 1997

Member

Jouhahn Lee wrote:
> Would you tell me how can I apply REVERSE only to the even row data in
> 64*32 array?

Henry Throop <throop@colorado.edu> already showed you an algorithm
I find confusing. I would do it like this:

data = indgen(64, 32) ; some test data
ydim = (size(data))[2] ; extract number of data rows
rev = indgen(ydim/2) * 2 ; generate the row indexing array
result = data ; only needed if you want to keep original array
result(*, rev) = reverse(data(*, rev), 2) ; reverse every second row

Voila,
Kevin
--
Kevin Ivory Tel: +49 5556 979 434
Max-Planck-Institut fuer Aeronomie Fax: +49 5556 979 240
Max-Planck-Str. 2 mailto:Kevin.Ivory@linmpi.mpg.de
D-37191 Katlenburg-Lindau, GERMANY http://www.gwdg.de/~kivory2/

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[Message index]

		Re: REVERSE even row elements in data array. By: Kevin Ivory on Mon, 03 August 1998 00:00
		Re: REVERSE even row elements in data array. By: Kevin Ivory on Mon, 03 August 1998 00:00
		Re: REVERSE even row elements in data array. By: davidf on Sun, 02 August 1998 00:00
		Re: REVERSE even row elements in data array. By: throop2 on Sun, 02 August 1998 00:00

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