case/variable.names {stats}

R Documentation

Case and Variable Names of Fitted Models

Description

Simple utilities returning (non-missing) case names, and (non-eliminated) variable names.

Usage

case.names(object, ...)
## S3 method for class 'lm'
case.names(object, full = FALSE, ...)

variable.names(object, ...)
## S3 method for class 'lm'
variable.names(object, full = FALSE, ...)

Arguments

object	an R object, typically a fitted model.
full	logical; if TRUE, all names (including zero weights, ...) are returned.
...	further arguments passed to or from other methods.

Value

A character vector.

See Also

lm; further, all.names, all.vars for functions with a similar name but only slightly related purpose.

Examples

x <- 1:20
y <-  x + (x/4 - 2)^3 + rnorm(20, sd=3)
names(y) <- paste("O",x,sep=".")
ww <- rep(1,20); ww[13] <- 0
summary(lmxy <- lm(y ~ x + I(x^2)+I(x^3) + I((x-10)^2),
                   weights = ww), cor = TRUE)
variable.names(lmxy)
variable.names(lmxy, full= TRUE)# includes the last
case.names(lmxy)
case.names(lmxy, full = TRUE)# includes the 0-weight case

---