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Plotting Velocity Vectors- Help Required
| Plotting Velocity Vectors- Help Required [message #1184] |
Mon, 05 July 1993 03:42 |
gnaa38
Messages: 17
Registered: June 1993
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Junior Member |
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Distribution: world
Newsgroups: comp.lang.idl-pvwave
Followup-To:
From: gnaa38@gla.ac.uk (Paul Porcelli)
Reply-To: gnaa38@gla.ac.uk
Organization: Glasgow University
Subject: IDL plotting velocity vectors help required
Keywords:
I have an existing Fortran/Gino program that i am using to plot velocity
vectors.
I also have an evaluation copy of IDL and am trying to rewrite the
program in IDL to compare them.
Im not sure how to emulate part of my program however and wonder if
anyone can advise.
My vectors need arrows to show direction and velocity. I achieve this in
the Fortran program by scaling the vectors appropriately. This gives me
two sets of X and Y coordinates. The second set are calcaulated by
adding the scaling.
I then plot the vectors by moving to the first set of X and Y's and then
using the Gino Arrow command to draw an arrow to the second set of X and
Y's. This gives me the required direction, and the speed is represented
by the length of the arrow.
If anyone has done this in IDL or PV-Wave i'd be greatful for some
advice.
Thanks in advance.
--
Paul Porcelli
Technical Programmer
Dept of Aerospace Engineering
University of Glasgow
E-Mail: gnaa38@tigermoth.aero.gla.ac.uk
Tel: 041-339-8855 (x4345)
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