Hi Everyone,
I'm trying to make a quiver plot using the example in examples collection.
The documentation says that I can define the arrow units as:
** *units*: [‘width’ | ‘height’ | ‘dots’ | ‘inches’ | ‘x’ | ‘y’ | ‘xy’]so I
did:
from pylab import *
from numpy import ma
X,Y = meshgrid( arange(0,2*pi,.2),arange(0,2*pi,.2) )
U = cos(X)
V = sin(Y)
figure()
M = sqrt(pow(U, 2) + pow(V, 2))
Q = quiver( X, Y, U, V, M, units='x', pivot='tip', width=0.022,
scale=1/0.15)
Q = quiver( X, Y, U, V, M, units='xy', pivot='tip', width=0.022,
scale=1/0.15)
qk = quiverkey(Q, 0.9, 1.05, 1, r'$1 \frac{m}{s}$',
labelpos='E',
fontproperties={'weight': 'bold'})
plot(X, Y, 'k.')
axis([-1, 7, -1, 7])
title("scales with x view; pivot='tip'")
show()
When I actually try the option 'xy' I get the following error:
Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
return self.func(*args)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
line 212, in resize
self.show()
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
line 215, in draw
FigureCanvasAgg.draw(self)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 314, in draw
self.figure.draw(self.renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 773, in
draw
for a in self.axes: a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1735, in draw
a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib/pymodules/python2.6/matplotlib/quiver.py", line 436, in
draw
self._init()
File "/usr/lib/pymodules/python2.6/matplotlib/quiver.py", line 425, in
_init
trans = self._set_transform()
File "/usr/lib/pymodules/python2.6/matplotlib/quiver.py", line 481, in
_set_transform
raise ValueError('unrecognized units')
ValueError: unrecognized units
Can someone point to where am I mistaken ? Is it a mistake in the
documentation ?
Thanks,
--
Oz Nahum
Graduate Student
Zentrum für Angewandte Geologie
Universität Tübingen
---
Imagine there's no countries
it isn't hard to do
Nothing to kill or die for
And no religion too
Imagine all the people
Living life in peace
------------------------------------------------------------------------------
Start uncovering the many advantages of virtual appliances
and start using them to simplify application deployment and
accelerate your shift to cloud computing.
http://p.sf.net/sfu/novell-sfdev2dev
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
