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Drawing vector fields with New Graphics [message #85074]

Mon, 01 July 2013 14:34

Gordon Farquharson
Messages: 48
Registered: December 2010

Member

Is there a way to plot (using New Graphics) two different vector fields on the same set of axes such that the vector fields have the same scaling?

Below is a minimal working program. What I want (and sort of expect) is that the v2 vectors be proportionally scaled with respect to the v1 vectors. What I get is that the v2 vectors appear larger than the v1 vectors, even though they are clearly smaller.

PRO test_vector

x = [0.,1.,2.]
y = [0.,0.,0.]
vx = [1.,1.,1.]
vy = [1.,1.,1.]

v1 = vector(vx, vy, x, y, $
XTITLE='X', YTITLE='Y', $
XRANGE=[0.,4.], YRANGE=[0.,4.])

v1.arrow_thick = 2
v1.length_scale = 2

stop

x = [1.,2.]
y = [1.,1.]
vx = [-0.5,-0.5]
vy = [-0.5,-0.5]

v2 = vector(vx, vy, x, y, $
/OVERPLOT)

v2.arrow_thick = 2
v2.length_scale = 2

END

Gordon

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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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