How to change the bounding box linewidth of a plot in python?

Question

I am getting trouble in finding example of changing linewidth of the boundary box of a plot in Pyhton plot.

For example, fig=plt.figure(figsize=(4.5, 4)) this command gives the dimension of the box in which python will plot the graph. But how to increase the linewidth of this boundary?

Answer 1

There are few options to do this depending on which boundary you are talking about.

Window. fig=plt.figure(figsize=(4.5, 4)) command embeds figure in window which is controlled by system. It's quite hard to find any solution here unless it's a hack. The only accessible option is to use root.overrideredirect(True) here:

import matplotlib.pyplot as plt
fig = plt.figure(figsize=(4.5, 4))
ax = fig.gca()
mng = plt.get_current_fig_manager()
mng.window.overrideredirect(True)
plt.show()

Figure. Another option is to change border of matplotlib.pyplot.figure :

import matplotlib.pyplot as plt
fig = plt.figure(figsize=(4.5, 4), edgecolor='blue', linewidth=3)
ax = fig.gca()
plt.show()

Axis.

If the option is to change width of matplotlib.pyplot.axis :

import matplotlib.pyplot as plt
fig = plt.figure(figsize=(4.5, 4))
ax = fig.gca()
for axis in ['top','bottom','left','right']:
    ax.spines[axis].set_linewidth(0.5)
plt.show()