Draw the QQ-Plot

In this example we are going to perform a visual goodness-of-fit test for an 1-d distribution with the QQ plot.

import openturns as ot
import openturns.viewer as viewer

Create data

distribution = ot.Gumbel(0.2, 0.5)
sample = distribution.getSample(100)
sample.setDescription(["Sample"])

Fit a distribution

distribution = ot.GumbelFactory().build(sample)

Draw QQ plot

graph = ot.VisualTest.DrawQQplot(sample, distribution)
view = viewer.View(graph)

Incorrect proposition

graph = ot.VisualTest.DrawQQplot(sample, ot.WeibullMin())
view = viewer.View(graph)

viewer.View.ShowAll()