Figure 17.

Worked example. The influence function for robust fitting, prior to the first iteration. The influence function is defined as RR/(1+RR2), where RR is defined in Equation 13. Even the points with the largest residuals (to the right on the graph) have substantial influence.

Motulsky and Brown BMC Bioinformatics 2006 7:123   doi:10.1186/1471-2105-7-123
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