I have a set of points which I am plotting like this:
import matplotlib.pyplot as plt`
x = [1,2,3,4,5,6]
y = [1,4,9,16,25,36]
plt.scatter(x, y)
plt.show()
This gives output like this
What I want is to drop perpendiculars from the points to the axes, like in the figure below:
How can this be achieved?
Using hlines and vlines you can plot horizontal and vertical lines respectively.
import matplotlib.pyplot as plt
x = [1,2,3,4,5,6]
y = [1,4,9,16,25,36]
plt.vlines(x, 0, y, linestyle="dashed")
plt.hlines(y, 0, x, linestyle="dashed")
plt.scatter(x, y, zorder=2)
plt.xlim(0,None)
plt.ylim(0,None)
plt.show()
The plot you're looking for is what's known as a stemplot, which has an answer you can find here. It will give you the vertical line connections to the x-axis you desire; but if you want the horizontal lines connecting to the y-axis that may need some special treatment. You may be able to use a stem plot in the other axis rotated or something.