\name{grp}
 \docType{data}
 \alias{grp}
 \title{A group indicator.}
 \description{
 This is a group indicator for the simulated gene expression data "dat" in
 the TSP package. The two groups are "healthy" and "diseased".
 }
 \usage{grp}
 \format{vector}
 \keyword{datasets}