A couple of us are trying to figure out how to scale arrows in a quiver plot so that we can exactly specify what the output arrows look like. For example, we'd like to scale the vectors to half of their size, and have it look like that on the quiver plot.
So I tried even just getting a quiver plot to plot an arrow exactly as I passed it, without it scaling anything. My attempt is this:
import matplotlib.pylab as plt
I'm trying to get the arrow to go from (0,0) to (1,1). However, with units='x', it's just short, and with units='y', it's just a bit too long. Furthermore, if I don't make the aspect ratio equal to one, I get wild results since the x-axis and y-axis are different units then. It would be really nice if there was a way to say units='data' (for data coordinates), and then if scale=1, the arrows would be drawn with the heads and tails at exactly the passed points. If scale=2, then each arrow would be drawn exactly half of its length. I realize that units='data' might mess up the other measurements of an arrow, though, so maybe another parameter is called for, like a scale_units, that defaults to units.
What do people think?