\name{PRv9mers}
\alias{PRv9mers}

\title{Print Run Quality version 9mers}
\description{
  Qualitative diagnostic plots looking at print-run quality.  This
  component examine the 9mers hybridizations.
}
\usage{
PRv9mers(fnames, path = ".", dev = "png", DEBUG = FALSE, prargs = NULL, samepr = TRUE, prname = "xMm", save = TRUE, ...)
}
%- maybe also 'usage' for other objects documented here.
\arguments{

  \item{fnames}{A "character" string naming the input files.}
  \item{path}{A "character" string representing the data directory. By
          default this is set to the current working directory (".").}
  \item{dev}{A "character" string naming the graphics device. This will
    take arguments "png", "jpeg" and "ps" only.}
  \item{DEBUG}{If 'TRUE', debug statements are printed.}
  \item{prargs}{A list with 4 components: Block, Row, Column and
    ncolumns. See Details for more information.}
  \item{samepr}{If 'TRUE', we assume everything in the directory are
    from the same print-run.}
  \item{prname}{A "character" string giving the name of the print-run.}
  \item{save}{If `TRUE', the figures will be saved to files.}
  \item{\dots}{additional arguments}
}
\details{
  The argument "prargs" is used to calculate the layout information
  about a print-run.  Components Block, Row and Columns denote the
  column names from the input data representing the print-tip location.
  The component "ncolumns" is an integer representing the number of
  print-tip columns in the data.  If the argument is set to NULL,
  the the following default will be used:  list(Block="Block",
  Row="Row", Column="Column", ncolumns=4). 
}
\value{
  Files of diagnostic plots and  excel files containings probe IDs of
  problematic probes.
}

\author{Jean Yee Hwa Yang}

\examples{
datadir <- system.file("gprQCData", package="arrayQuality")
if (interactive())
PRv9mers(fnames="12Mm250.gpr", path=datadir, prname="12Mm")
}
\keyword{hplot}% at least one, from doc/KEYWORDS