Draw axis lines or the origin for Matplotlib contour plot
75,000
Solution 1
There are a number of options (E.g. centered spines), but in your case, it's probably simplest to just use axhline
and axvline
.
E.g.
import numpy as np
import matplotlib.pyplot as plt
xvec = np.linspace(-5.,5.,100)
x,y = np.meshgrid(xvec, xvec)
z = -np.hypot(x, y)
plt.contourf(x, y, z, 100)
plt.colorbar()
plt.axhline(0, color='white')
plt.axvline(0, color='white')
plt.show()
Solution 2
Can't you just overlay a straight line?
plt.plot([0,0],[-4,4],lw=3,'w')
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Updated on September 13, 2020Comments
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nos over 3 years
I want to draw
x=0
andy=0
axis in my contour plot, using a white color. If that is too cumbersome, I would like to have a white dot denoting where the origin is.My contour plot looks as follows and the code to create it is given below.
xvec = linspace(-5.,5.,100) X,Y = meshgrid(xvec, xvec) fig = plt.figure(figsize=(6, 4)) contourf(X, Y, W,100) plt.colorbar()