R/regboot.R

In musto101/wilcox_R: What the package does (short line)

regboot <-
function(isub,x,y,regfun,...){
#
#  Perform regression using x[isub] to predict y[isub]
#  isub is a vector of length n,
#  a bootstrap sample from the sequence of integers
#  1, 2, 3, ..., n
#
#  This function is used by other functions when computing
#  bootstrap estimates.
#
#  regfun is some regression method already stored in R
#  It is assumed that regfun$coef contains the  intercept and slope
#  estimates produced by regfun.  The regression methods written for
#  this  book, plus regression functions in R, have this property.
#
#  x is assumed to be a matrix containing values of the predictors.
#
xmat<-matrix(x[isub,],nrow(x),ncol(x))
vals<-regfun(xmat,y[isub],...)$coef
vals
}