I want to draw x=0
and y=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()
To put the origin at the center of the figure we use the spines module from the matplotlib module. Basically, spines are the lines connecting the axis tick marks and noting the boundaries of the data area.
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()
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With