\name{nextPDColumn}
\alias{resetPDColumns}
\alias{nextPDColumn}
\title{
Counter for columns in Pretest Description file.
}
\usage{
nextPDColumn()
resetPDColumns(zeroColumn=0)
}

\arguments{
  \item{zeroColumn}{Initial value for column counter, default zero.}
}
\description{
  These functions are used for generating the column indexes for Pretest
  Description files.  The \code{nextPDColumn} function increments the
  column counter and returns the current value.  The \code{restPDColumn}
  function sets the value of the counter.  This can be set to a value
  other than zero to account for columns for demographic variables which
  will be added later.
}
\section{Side Effects}{
  A gobal variable called \code{pdColumnCount} implements the current
  value of the counter.
}
\section{Under Construction}{
  Should rewrite this to use proper closures.
}
\seealso{
  \code{\link{amdToPD}}
}
\keyword{interface}