【Python】matplotlib中pyplot.subplots_adjust参数含义的理解

官方文档¹：
def subplots_adjust(self, left=None, bottom=None, right=None, top=None, wspace=None, hspace=None)

	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 space between subplots,
	              # expressed as a fraction of the average axis width
	hspace = 0.2  # the amount of height reserved for space between subplots,
	              # expressed as a fraction of the average axis height

参数含义：
left, right, bottom, top：子图所在区域的边界。
当值大于1.0的时候子图会超出figure的边界从而显示不全；值不大于1.0的时候，子图会自动分布在一个矩形区域（下图灰色部分）。
要保证left < right, bottom < top，否则会报错。
如下图：

wspace, hspace：子图之间的横向和纵向间距。
无论如何所有子图都不会超出left, right, top, bottom所围区域。子图的长宽比不变，而是按比例缩小，所以调整横向间距也可能影响纵向间距，反之亦然。
如下图：