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After some struggling I got my first plots with quiver working.
A simple plot is very simple, but a complicated one is very different.
Right now I have a 80x80 grid with multiple plots and I plan to go up. 
For this I need full control of the arrow dimensions.
The only way I can get narrow arrow is by setting width:
plt.quiver(x,y,u,v, width=0.001, headwidth=3, scale=0.07,...
works fine for me. But I would like to set the linewidth per arrow.
On stackoverflow I found:
widths = np.linspace(0, 2, X.size)
plt.quiver(X, Y, cos(deg), sin(deg), linewidths=widths)
This did not work for me: the minimum width was too large.
I there a way to create narrow arrows with varying width?
Thanks

Got it working!
(new problems in the making...)

Hello,
I would like to have a set of quiver plots on top of each other: the x/y
positions remain the same but the arrows have different directions. The
arrays are largely empty so the multiple-arrow problem is not that bad
(and very interesting). Can this be done? Right now only the last quiver
plot is visible, the others are gone after plotting.
The objective is multiple arrows on one x/y location, in different
colors. If this can be done in another way please share it.
If it is of any importance: I have arrays with x/y/u/v data, and for
all arrays the x/y positions are the same.
Thanks!

Hi gsal,
Would you mind sharing a simple example how did you manage to that? I am
trying to freeze a simple code with matplotlib for the past two days with no
success, every time I get the "No module backend_tkagg" message... ;(
Many thanks for help in advance!
gsal wrote
> oh, I got it...needed to include backend package in the cf_freeze setup
> script.
> 
> thanks,
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