

   CCaassee aanndd VVaarriiaabbllee NNaammeess ooff FFiitttteedd MMooddeellss

        case.names(obj, ...)
        case.names.lm(obj, full = FALSE)

        variable.names(obj, ...)
        variable.names.lm(obj, full = FALSE)

   AArrgguummeennttss::

        obj: an R object, typically a fitted model.

       full: logical; if `TRUE', all names (including zero
             weights,..) are returned.

   DDeessccrriippttiioonn::

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

   VVaalluuee::

        A character vector

   SSeeee AAllssoo::

        `lm'

   EExxaammpplleess::

        x <- 1:20
        y <-  x + (x/4 - 2)^3 + rnorm(20, s=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

