Matplotlib子图相关操作

# 准备画布
fig = plt.figure()
# 添加子图 2 * 2 的第1张图
ax1 = fig.add_subplot(221)
# 添加子图 2 * 2 的第2张图
ax2 = fig.add_subplot(222)
# 添加子图 2 * 2 的第3张图
ax3 = fig.add_subplot(223)
# 添加子图 2 * 2 的第4张图
ax4 = fig.add_subplot(224)
# 设置子图的标题
ax1.title.set_text('First Plot')
ax2.title.set_text('Second Plot')
ax3.title.set_text('Third Plot')
ax4.title.set_text('Fourth Plot')

# 设置子图边距和间隔
left  = 0.125  # the left side of the subplots of the figure
right = 0.9    # the right side of the subplots of the figure
bottom = 0.1   # the bottom of the subplots of the figure
top = 0.9      # the top of the subplots of the figure
wspace = 0.2   # the amount of width reserved for blank space between subplots,
               # expressed as a fraction of the average axis width
hspace = 0.2   # the amount of height reserved for white space between subplots,
               # expressed as a fraction of the average axis height

plt.subplots_adjust(left=left, bottom=bottom, right=right, top=top,
                wspace=wspace, hspace=hspace)
# 展示
plt.show()