nlme (version 3.1-16)

pairs.lmList: Pairs Plot of an lmList Object

Description

Diagnostic plots for the linear model fits corresponding to the object components are obtained. The form argument gives considerable flexibility in the type of plot specification. A conditioning expression (on the right side of a | operator) always implies that different panels are used for each level of the conditioning factor, according to a Trellis display. The expression on the right hand side of the formula, before a | operator, must evaluate to a data frame with at least two columns. If the data frame has two columns, a scatter plot of the two variables is displayed (the Trellis function xyplot is used). Otherwise, if more than two columns are present, a scatter plot matrix with pairwise scatter plots of the columns in the data frame is displayed (the Trellis function splom is used).

Usage

## S3 method for class 'lmList':
pairs(object, form, label, id, idLabels, grid, ...)

Value

a diagnostic Trellis plot.

See Also

lmList

Examples

data(Orthodont)
fm1 <- lmList(distance ~ age | Subject, Orthodont)
# scatter plot of coefficients by gender, identifying unusual subjects
pairs(fm1, ~coef(.) | Sex, id = 0.1, adj = -0.5)    
# scatter plot of estimated random effects
pairs(fm1, ~ranef(.))