DAAG (version 1.17)

lmdiags: Return data required for diagnostic plots

Description

This extracts the code that provides the major part of the statistical information used by plot.lm, leaving out the code used to provide the graphs

Usage

lmdiags(x, which = c(1L:3L, 5L), cook.levels = c(0.5, 1))

Arguments

x

This must be an object of class lm object, or that inherits from an object of class lm.

which

a subset of the numbers '1:6', indicating the plots for which statistical information is required

cook.levels

Levels for contours of cook.levels, by default c(0.5,1)

Value

• yh
  fitted values
• rs
  standardized residuals (for glm models standardized deviance residuals)
• yhn0
  As yh, but omitting observations with zero weight
• cook
  Cook's statistics
• hii
  Diagonal elements of the hat matrix
• rsp
  standardized residuals (for glm models standardized Pearson residuals)

Details

See plot.lm for additional information.

References

See references for plot.lm

See Also

plotSimDiags.lm, plot.lm

Examples

women.lm <- lm(weight ~ height, data=women)
veclist <- lmdiags(x=women.lm)
## Returns the statistics that are required for graphs 1, 2, 3, and 5