docs/05-qqplot.md

In ppernot/ErrView: Analysis of error sets

QQ-Plot module

This module enables to assess the normality of the errors distribution by plotting its quantiles vs. those of a normal distribution.

The errors are centered and scaled for the comparison.

Controls

Method

• Select: select the error set

• Remove glob. outl.: remove global outliers (if any) defined in module Outliers

Histogram

• Inter-quartile Reg. line: plot a line passing through the limits of the inter-quartile range. For a normal distribution the line should be on the diagonal.

• Confidence interval: plot a 95% confidence interval accounting for the finite size of the data set. Ideally, the points should not strongly deviate from this interval.

• Range of plot: define the range of the plot.

Plot

The quantiles of the centered and scaled errors are plotted against the theoretical quantiles for a normal distribution (blue points). For a normal data set, these should lie close to the diagonal.

ppernot/ErrView documentation built on Jan. 30, 2022, 6:59 a.m.