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Re: making a checkerboard array? [message #56020 is a reply to message #55935]

Tue, 25 September 2007 15:59

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jean H writes:

> IDL> nx=20
> IDL> ny=20
> IDL> l=lindgen(nx,ny)
> IDL> l=(l mod (nx*2) lt nx) XOR (l/nx mod (ny*2) ge ny)
> IDL> print,l

If there is a question in there, I think this is the answer:

IDL> nx=20
IDL> ny=20
IDL> l =lindgen(nx, ny)
IDL> l=(l mod (2) lt 1) XOR (l/nx mod (2) ge 1)
IDL> print, l
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		making a checkerboard array? By: Mike[2] on Tue, 25 September 2007 09:27
		Re: making a checkerboard array? By: David Fanning on Wed, 26 September 2007 10:39
		Re: making a checkerboard array? By: JD Smith on Wed, 26 September 2007 10:27
		Re: making a checkerboard array? By: James Kuyper on Wed, 26 September 2007 10:29
		Re: making a checkerboard array? By: R.G.Stockwell on Wed, 26 September 2007 09:44
		Re: making a checkerboard array? By: edward.s.meinel@aero. on Thu, 27 September 2007 07:54
		Re: making a checkerboard array? By: Allan Whiteford on Wed, 26 September 2007 09:37
		Re: making a checkerboard array? By: David Fanning on Wed, 26 September 2007 08:29
		Re: making a checkerboard array? By: David Fanning on Wed, 26 September 2007 08:28
		Re: making a checkerboard array? By: Bruce Bowler on Wed, 26 September 2007 08:19
		Re: making a checkerboard array? By: Mike[2] on Wed, 26 September 2007 08:02
		Re: making a checkerboard array? By: Mike[2] on Wed, 26 September 2007 07:46
		Re: making a checkerboard array? By: David Fanning on Tue, 25 September 2007 15:59
		Re: making a checkerboard array? By: Jean H. on Tue, 25 September 2007 15:07
		Re: making a checkerboard array? By: David Fanning on Tue, 25 September 2007 14:52
		Re: making a checkerboard array? By: JD Smith on Tue, 25 September 2007 14:34
		Re: making a checkerboard array? By: David Fanning on Tue, 25 September 2007 09:56

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