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Plotting Vectors with Coyote Graphics Programs [message #88132]

Sat, 22 March 2014 13:20

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

I've written a new vector plotting program, cgVelocityVectors, today in
the manner of the NASA Astronomy Library routine PartVelVec. I had a
couple of objectives in mind. First, I wanted an easier way to make a
vector length key so users could easily match the length of a vector to
its magnitude. Second, I wanted to add a couple of features to the
program to make the vectors more attractive. For example, I wanted to be
able to draw vectors with solid arrow heads.

A length key or legend can easily be contructed using two keywords,
ReferenceVector and Length. ReferenceVector is used to specify a
reference magnitude against which all vectors are scaled before they are
displayed. Length specifies the length of the reference vector, in
normalized coordinates. This allows you to adjust vector length on the
plot with respect to a reference vector. You always are certain what a
length means. Vectors can be overplotted on maps, contour plots, and in
other graphics windows.

You can learn more about the program here:

https://www.idlcoyote.com/graphics_tips/vectors.html

And you can read the documentation for the program here:

https://www.idlcoyote.com/idldoc/cg/cgvelocityvectors.html

Cheers,

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

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[Message index]

		Plotting Vectors with Coyote Graphics Programs By: David Fanning on Sat, 22 March 2014 13:20
		Re: Plotting Vectors with Coyote Graphics Programs By: David Fanning on Mon, 24 March 2014 12:34
		Re: Plotting Vectors with Coyote Graphics Programs By: David Fanning on Wed, 26 March 2014 08:46
		Re: Plotting Vectors with Coyote Graphics Programs By: Dick Jackson on Wed, 26 March 2014 11:01

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