statsmodels.graphics.gofplots.qqline¶

statsmodels.graphics.gofplots.
qqline
(ax, line, x=None, y=None, dist=None, fmt='r')[source]¶ Plot a reference line for a qqplot.
Parameters: ax : matplotlib axes instance
The axes on which to plot the line
line : str {‘45’,’r’,’s’,’q’}
Options for the reference line to which the data is compared.:
 ‘45’  45degree line
 ‘s’  standardized line, the expected order statistics are scaled by
 the standard deviation of the given sample and have the mean added to them
 ‘r’  A regression line is fit
 ‘q’  A line is fit through the quartiles.
 None  By default no reference line is added to the plot.
x : array
X data for plot. Not needed if line is ‘45’.
y : array
Y data for plot. Not needed if line is ‘45’.
dist : scipy.stats.distribution
A scipy.stats distribution, needed if line is ‘q’.
Notes
There is no return value. The line is plotted on the given ax.