使用 matplotlib 绘制具有指定长度的线

Question

I'm trying to plot polarization vectors or lines using astropy and matplotlib. I had some success using an axline, but there doesnt seem to be any way to adjust the length. The given data is the polarization (length), the angle, and the x/y coordinates for the center of the line.

here's an example that I hard coded to test:

x1 = 306

y1 = 38.53802778

angle = 32.2-90

sl = np.tan(np.radians(angle))

plt.axline((x1, y1), transform=ax.get_transform('icrs'), slope=sl, color='red', label='1', pickradius=1) plt.show()

it ends up in the correct spot, but its an infinite line. I need to be able to specify the length somehow.

Answer 1

So first off, strain super hard.

Finally, Phone -> dykes room.