statsmodels.graphics.gofplots.ProbPlot.qqplot

method

ProbPlot.qqplot(xlabel=None, ylabel=None, line=None, other=None, ax=None, **plotkwargs)

Q-Q plot of the quantiles of x versus the quantiles/ppf of a distribution or the quantiles of another ProbPlot instance.

Parameters

xlabel, ylabelstr or None, optional

User-provided lables for the x-axis and y-axis. If None (default), other values are used depending on the status of the kwarg other.

linestr {‘45’, ‘s’, ‘r’, q’} or None, optional

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.

otherProbPlot instance, array-like, or None, optional

If provided, the sample quantiles of this ProbPlot instance are plotted against the sample quantiles of the other ProbPlot instance. Sample size of other must be equal or larger than this ProbPlot instance. If the sample size is larger, sample quantiles of other will be interpolated to match the sample size of this ProbPlot instance. If an array-like object is provided, it will be turned into a ProbPlot instance using default parameters. If not provided (default), the theoretical quantiles are used.

axMatplotlib AxesSubplot instance, optional

If given, this subplot is used to plot in instead of a new figure being created.

**plotkwargsadditional matplotlib arguments to be passed to the

plot command.

Returns

figMatplotlib figure instance

If ax is None, the created figure. Otherwise the figure to which ax is connected.