plt．subplot（221）：221表示将画板划分为2行2列，然后取第1个区域。 那么第几个区域是怎么界定的呢？ 这个规则遵循行优先数数规则！ 比如说4个区域： ...

Figures with Multiple Subplots Axes can be added to a matplotlib Figure canvas manually using fig.add_axes or using a sub-figure layout manager such as subplots, subplot2grid, or gridspec. Subplots ...

Figure Object Now that we've seen the basics, let's break it all down with a more formal introduction of Matplotlib's Object Oriented API. This means we will instantiate figure objects and then call ...