\name{colExtract}
\alias{colExtract}
\title{Extract a column from a tab delimited file with header}
\description{
This function allows to extract a specific column from a tab delimited file generated by oneChannelGUI.
The file should contain an header. This function is useful to extract probe set ids to be used fro ven diagram representations}
\usage{
colExtract()
}
\author{Raffaele A Calogero}
\keyword{ manip }