\Header{PrintLayout}{Print Layout - class}
\alias{PrintLayout-class}{PrintLayout}
\keyword{classes}{PrintLayout}
\keyword{data}{PrintLayout}
\begin{Description}\relax
A list-based class for storing information about the process used to print spots on a microarray.

\code{PrintLayout} objects can be created using \code{\Link{getLayout}}.
The \code{printer} component of an \code{RGList} or \code{MAList} object is of this class.\end{Description}
\begin{Section}{Slots/List Components}
Objects of this class contains no slots but should contain the following list components:
\Tabular{ll}{
\code{ngrid.r}:& number of grid rows on the arrays\\
\code{ngrid.c}:& number of grid columns on the arrays\\
\code{nspot.r}:& number of rows of spots in each grid\\
\code{nspot.c}:& number of columns of spots in each grid\\
\code{ndups}:& number of duplicates of each DNA clone, i.e., number of times print-head dips into each well of DNA\\
\code{spacing}:& number of spots between duplicate spots.  Only applicable if \code{ndups>1}.
\code{spacing=1} for side-by-side spots by rows, \code{spacing=nspot.c} for side-by-side spots by columns, \code{spacing=ngrid.r*ngrid.c*nspot.r*nspot.c/2} for duplicate spots in top and bottom halves of each array.\\
\code{npins}:& actual number of pins or tips on the print-head\\
\code{start}:& character string giving position of the spot printed first in each grid.
Choices are \code{"topleft"} or \code{"topright"} and partial matches are accepted.
}\end{Section}
\begin{Author}\relax
Gordon Smyth
\end{Author}
\begin{SeeAlso}\relax
\link{2.Classes} gives an overview of all the classes defined by this package.
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
#  Settings for Swirl and ApoAI example data sets in User's Guide

printer <- list(ngrid.r=4, ngrid.c=4, nspot.r=22, nspot.c=24, ndups=1, spacing=1, npins=16, start="topleft")

#  Typical settings at the Australian Genome Research Facility

#  Full pin set, duplicates side-by-side on same row
printer <- list(ngrid.r=12, ngrid.c=4, nspot.r=20, nspot.c=20, ndups=2, spacing=1, npins=48, start="topright")

#  Half pin set, duplicates in top and lower half of slide
printer <- list(ngrid.r=12, ngrid.c=4, nspot.r=20, nspot.c=20, ndups=2, spacing=9600, npins=24, start="topright")
\end{ExampleCode}
\end{Examples}

