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’ - 45-degree 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.