statistics example code: boxplot_color_demo.py

(Source code, png)

# Box plots with custom fill colors

import matplotlib.pyplot as plt
import numpy as np

# Random test data
np.random.seed(123)
all_data = [np.random.normal(0, std, 100) for std in range(1, 4)]

fig, axes = plt.subplots(nrows=1, ncols=2, figsize=(12, 5))

# rectangular box plot
bplot1 = axes[0].boxplot(all_data,
                         vert=True,   # vertical box aligmnent
                         patch_artist=True)   # fill with color

# notch shape box plot
bplot2 = axes[1].boxplot(all_data,
                         notch=True,  # notch shape
                         vert=True,   # vertical box aligmnent
                         patch_artist=True)   # fill with color

# fill with colors
colors = ['pink', 'lightblue', 'lightgreen']
for bplot in (bplot1, bplot2):
    for patch, color in zip(bplot['boxes'], colors):
        patch.set_facecolor(color)

# adding horizontal grid lines
for ax in axes:
    ax.yaxis.grid(True)
    ax.set_xticks([y+1 for y in range(len(all_data))], )
    ax.set_xlabel('xlabel')
    ax.set_ylabel('ylabel')

# add x-tick labels
plt.setp(axes, xticks=[y+1 for y in range(len(all_data))],
         xticklabels=['x1', 'x2', 'x3', 'x4'])

plt.show()

Keywords: python, matplotlib, pylab, example, codex (see Search examples)