A DOTTED GRID IN MATPLOTLIB

Listing 5.9 displays the content of plotdottedgrid1.py that illustrates how to plot a “dotted” grid pattern.

LISTING 5.9: plotdottedgrid1.py

import numpy as np
import pylab
from itertools import product
import matplotlib.pyplot as plt

fig = pylab.figure()
ax = fig.add_subplot(1,1,1)

ax.grid(which='major', axis='both', linestyle='--')

[line.set_zorder(3) for line in ax.lines]
fig.show() # to update

plt.gca().xaxis.grid(True)
plt.show()

Listing 5.9 is similar to the code in Listing 5.8 in that both of them plot a grid-like pattern; however, the former renders a “dotted” grid pattern whereas the latter renders a “dotted” grid pattern by specifying the value '--' for the linestyle parameter.

The next portion of Listing 5.9 invokes the set_zorder() method, that controls which items are displayed on top of other items, such as dots on top of lines, or vice versa. The final portion...