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making a checkerboard array? [message #55935]

Tue, 25 September 2007 09:27

Mike[2]
Messages: 99
Registered: December 2005

Member

I'm trying to make a checkerboard mask for an array, but I'm missing
something that is likely to be obvious to the IDL array masters. The
following code makes a pattern like this (use a fixed width font):

+++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++

Can anyone help me fill in the missing rectangles like this?

+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
+++++00000+++++00000+++++00000
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++
00000+++++00000+++++00000+++++

Nx=300
Ny=200
Nrects = 10
Xside = Nx/Nrects
Yside = Ny/Nrects
xs = [replicate(1,Xside), replicate(0,Xside)]
while n_elements(xs) lt Nx do xs = [xs, [replicate(1,Xside),
replicate(0,Xside)]]
xs = xs[0:Nx-1]
ys = [replicate(1,Yside), replicate(0,Yside)]
while n_elements(ys) lt Ny do ys = [ys, [replicate(1,Yside),
replicate(0,Yside)]]
ys = ys[0:Ny-1]
window, xsize=Nx, ysize=Ny
tvscl, xs # ys

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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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