cooks_stats: Cook's statistics

In api2lm: Functions and Data Sets for the Book "A Progressive Introduction to Linear Models"

Cook's statistics

Description

cooks_stats returns the ordered Cook's statistics (distances) decreasing in value of model to identify the most influential observations.

Usage

cooks_stats(model, n = 6L)

Arguments

model

A fitted model object from the lm function.

n

an integer vector of length up to dim(x) (or 1, for non-dimensioned objects). Values specify the indices to be selected in the corresponding dimension (or along the length) of the object. A positive value of n[i] includes the first/last n[i] indices in that dimension, while a negative value excludes the last/first abs(n[i]), including all remaining indices. NA or non-specified values (when length(n) < length(dim(x))) select all indices in that dimension. Must contain at least one non-missing value.

Value

A vector of statistics

See Also

cooks.distance.

Examples

lmod <- lm(price ~ sqft_living, data = home_sales)
cooks_stats(lmod, n = 5)

api2lm documentation built on July 9, 2023, 5:52 p.m.