Draw univariate plots for <cite>x</cite> and <cite>y</cite> separately.
参数：func：plotting callable
This must take a 1d array of data as the first positional argument, it must plot on the “current” axes, and it must accept a “vertical” keyword argument to orient the measure dimension of the plot vertically.
kwargs：key, value mappings
Keyword argument are passed to the plotting function.
