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quiver vector plot problem

Hello All,
I am using matplotlib0.8. With the quiver function I
have tried to plot a vector. However for some reason I
do not get what I want.
I have problem with the S (according the comments a
scaling parameter) parameter. When I set it to 0 (S = 0
), I get the correct vector with correct direction,
however the arrow head is not present. When I set it to
2 (S= 2) for instance, I get a scaling which I dont
understand. The direction of my vector has changed.
This is something which I do not want. I was wondering
if this is a bug or whether it is my misunderstandin g
of this scaling parameter. What I want is no scaling
(S=0) but then an arrow with an arrow head. A scaling
might be useful in the future but then I think the
direction should not changed, since a vector is
characterized by its direction. Many thanks in advance
for whoever that can help me out with this problem.
Here below you can see my python code.

Robert
------------------------------
from pylab import *

X = array([ [3] ])
Y = array([ [3] ])

print "X = ",X
print "Y = ",Y

U = array([ [1] ])
V = array([ [2] ])

print "U = ",U
print "V = ",V
grid(True)
quiver(X, Y, U, V, 2.0, color=None, width=1.0)
axis([0,6,0,6])

show()
-------------------------

Jul 19 '05 #1
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