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Notable Coyote Program Updates [message #73662]

Tue, 23 November 2010 07:41

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

As some of you have probably realized, I'm in the process
of completely refurbishing my Coyote Library. This is what
happens when you start writing a book. Explaining how
something works gives you a MUCH better idea of how
something *ought* to work!

The work is on-going and probably won't be completely
finished until early next year. But I wanted to give
you a heads-up on a couple of notable changes today.

I have made the TVScale command completely obsolete
by moving all the unique TVScale functionality over
to TVImage. This means you can scale images on the
fly with TVImage using the "normal" scaling keywords:
MinValue, MaxValue, Bottom, Top, and NColors.

I particularly like the NCOLORS and BOTTOM keywords
together, because you can immediately scale image
data into, say, 12 colors like this:

IDL> LoadCT, 33, NColors=12, Bottom=1
IDL> TVImage, image, NColors=12, Bottom=1

Pretty neat. :-)

There is also a conflict in IDL 8 with the old IDL
ARROW program, which is still in the IDL lib directory.
This conflicts with the ARROW function, which is in
the lib/graphics directory. If you want to use the
*old* ARROW program, you need to name it something
else. Since I was renaming it, and since I wanted to
add additional functionality to it, including making
it machine and color mode independent, I just decided
to do it right, so I've named this FSC_Arrow and put
it in the Coyote Library.

Finally, I have replaced ZPLOT and ZIMAGE, which provide
interactive zooming into line plots and images,
respectively, with FSC_ZPlot and FSC_ZImage. These new
programs are device and color independent, and
FSC_ZImage now works with both 2D and True-Color images.
Plus, it works correctly with images that are very, very
large and wouldn't fit on your display.

I've made other small changes to the new FSC_*** series
of programs to make sure color variables don't change
data type as a result of program manipulation.

I appreciate the feedback from people who are using these
programs. They are getting pretty darn good, if I do say
so myself. :-)

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]

		Notable Coyote Program Updates By: David Fanning on Tue, 23 November 2010 07:41
		Re: Notable Coyote Program Updates By: Jianbao on Wed, 24 November 2010 10:59
		Re: Notable Coyote Program Updates By: David Fanning on Tue, 23 November 2010 10:58
		Re: Notable Coyote Program Updates By: David Fanning on Tue, 23 November 2010 10:52
		Re: Notable Coyote Program Updates By: Paul Van Delst[1] on Tue, 23 November 2010 10:44
		Re: Notable Coyote Program Updates By: Paul Van Delst[1] on Tue, 23 November 2010 10:43
		Re: Notable Coyote Program Updates By: David Fanning on Mon, 29 November 2010 13:12
		Re: Notable Coyote Program Updates By: JMZawodny on Mon, 29 November 2010 12:08

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