QQ Plot of two samples’ quantiles.
Can take either two ProbPlot instances or two arraylike objects. In the case of the latter, both inputs will be converted to ProbPlot instances using only the default values  so use ProbPlot instances if finergrained control of the quantile computations is required.
Parameters:  data1, data2 : arraylike (1d) or ProbPlot instances xlabel, ylabel : str or None
line : str {‘45’, ‘s’, ‘r’, q’} or None
ax : Matplotlib AxesSubplot instance, optional


Returns:  fig : Matplotlib figure instance

See also
scipy.stats.probplot
Notes
Examples
>>> x = np.random.normal(loc=8.5, scale=2.5, size=37)
>>> y = np.random.normal(loc=8.0, scale=3.0, size=37)
>>> pp_x = sm.ProbPlot(x)
>>> pp_y = sm.ProbPlot(y)
>>> qqplot_2samples(data1, data2, xlabel=None, ylabel=None, line=None, ax=None):