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Re: Drawing vector fields with New Graphics [message #85081 is a reply to message #85080]

Tue, 02 July 2013 07:38

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Phillip Bitzer writes:

> This note in the help scares me:
> Note: The units for the U and V components are arbitrary, and are not related to the units of the X and Y coordinates. The VECTOR function will compute a default length scale and head size based upon the overall number of vectors and the average magnitude of the vectors. The LENGTH_SCALE and HEAD_SCALE properties may be used to change the default size.
>
> Intuitively (at least to me), this should not be the behavior. Uv, Ux should mean *something* about the magnitude.

This should scare ALL of us! Good God.

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]

		Drawing vector fields with New Graphics By: Gordon Farquharson on Mon, 01 July 2013 14:34
		Re: Drawing vector fields with New Graphics By: Phillip Bitzer on Tue, 02 July 2013 07:31
		Re: Drawing vector fields with New Graphics By: David Fanning on Tue, 02 July 2013 07:38
		Re: Drawing vector fields with New Graphics By: Gordon Farquharson on Tue, 02 July 2013 10:54
		Re: Drawing vector fields with New Graphics By: David Fanning on Tue, 02 July 2013 11:10
		Re: Drawing vector fields with New Graphics By: David Fanning on Tue, 02 July 2013 11:32
		Re: Drawing vector fields with New Graphics By: Phillip Bitzer on Tue, 02 July 2013 11:15
		Re: Drawing vector fields with New Graphics By: David Fanning on Tue, 02 July 2013 11:40
		Re: Drawing vector fields with New Graphics By: Gordon Farquharson on Tue, 02 July 2013 12:08
		Re: Drawing vector fields with New Graphics By: Mark Piper on Thu, 04 July 2013 13:20

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