'Plot the survival function.
Examples
Change the line color:
>>> import statsmodels.api as sm
>>> data = sm.datasets.get_rdataset("flchain", "survival").data
>>> df = data.loc[data.sex == "F", :]
>>> sf = sm.SurvfuncRight(df["futime"], df["death"])
>>> fig = sf.plot()
>>> ax = fig.get_axes()[0]
>>> li = ax.get_lines()
>>> li[0].set_color(\'purple\')
>>> li[1].set_color(\'purple\')
Don\'t show the censoring points:
>>> fig = sf.plot()
>>> ax = fig.get_axes()[0]
>>> li = ax.get_lines()
>>> li[1].set_visible(False)'

def plot(self, ax=None):

    return plot_survfunc(self, ax)
