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Re: Can you please explain me the meaning of the following IDL code? [message #92986 is a reply to message #92983]

Tue, 05 April 2016 07:13

wlandsman
Messages: 743
Registered: June 2000

Senior Member

Did you try to run it?

It displays a 400 x 400 image on the screen, consisting of a 4 x 4 grid of 16 boxes (each of size 100 x 100) with intensity varying 0 to 256.

The code uses a non-standard procedure CTV, which is likely from an image display package I wrote 20 years ago
idlastro.gsfc.nasa.gov/ftp/contrib/landsman/mousse/
I would suggest replacing this with the intrinsic TV command or better yet with CGIMAGE from the Coyote library
http://www.idlcoyote.com/graphics_tips/coyote_graphics.php

If you are trying to learn IDL I would suggest using a beginners guide such as

http://learnidl.com/
http://www.faculty.virginia.edu/rwoclass/astr511/IDLguide.ht ml
http://slugidl.pbworks.com/w/page/28913065/A%20Slug%27s%20Gu ide%20to%20IDL

This newsgroup is very useful for specific questions, but it is not the place to learn IDL. --Wayne

On Tuesday, April 5, 2016 at 4:14:47 AM UTC-4, Sonu Tabitha wrote:
> patt=bytarr(400,400)
> q=bytarr(100,100)+16
> for i=0,3 do for j=0,3 do patt[i*100,j*100]=(i+4*j)*q
> ctv,patt
> end

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[Message index]

		Can you please explain me the meaning of the following IDL code? By: Sonu Tabitha on Tue, 05 April 2016 01:14
		Re: Can you please explain me the meaning of the following IDL code? By: rawahranger on Tue, 05 April 2016 07:08
		Re: Can you please explain me the meaning of the following IDL code? By: wlandsman on Tue, 05 April 2016 07:13
		Re: Can you please explain me the meaning of the following IDL code? By: Sonu Tabitha on Thu, 07 April 2016 05:08

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