Eric, OK, that seems to work. I tried something with scale_units earlier without success, but I must have been doing something wrong.
Thanks for the help. Dave > On 2012/08/29 10:07 AM, David Raymond wrote: > > > > I think that I have found a serious bug in vector plotting (quiver) > > when the "angle=xy" option is used on a plot with a large aspect > > ratio. It is my understanding that with this option, the vector with > > tail at (x,y) would have its head at (x + vx,y + vy); at least this is > > what it says in the documentation. > > Not a bug. > Note this in the documentation: > > *scale_units*: *None*, or any of the *units* options. > For example, if *scale_units* is 'inches', *scale* is 2.0, and > ``(u,v) = (1,0)``, then the vector will be 0.5 inches long. > If *scale_units* is 'width', then the vector will be half the width > of the axes. > > If *scale_units* is 'x' then the vector will be 0.5 x-axis > units. To plot vectors in the x-y plane, with u and v having > the same units as x and y, use > "angles='xy', scale_units='xy', scale=1". > > Try this modified call to quiver: > > q = plt.quiver(X, Y, vx, vy, angles='xy', scale_units='xy') > > Eric ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
