\name{drplot}
\alias{drplot}
\title{Plot dose-response models}
\description{
Produce graphics of dose-response data and dose-response relationships
either combined or separately, for one or more substances.
}
\usage{
drplot(drresults, data, dtype, alpha, path, fileprefix, overlay,
postscript, png, bw, colors, devoff, lpos)
}
\arguments{
\item{drresults}{
A data frame as returned from \code{\link{drfit}}.
}
\item{data}{
A data frame as returned from \code{\link{drdata}}. The data frame has to
contain at least a factor called "substance", a vector called "unit"
containing the unit used for the dose, a column "response" with the
response values of the test system normalized between 0 and 1, a column
"dose" with the numeric dose values and a factor called "dosefactor"
containing the dose as a factor.
}
\item{dtype}{
A string describing if the raw data should be plotted ("raw"), or an error
bar should be constructed from the standard deviations of the responses at
each dose level ("std", default value) or from the confidence intervals
("conf"). If you don't want to see the data, set it to "none".
}
\item{alpha}{
The confidence level, defaulting to 0.95, only used if dtype "conf" has been
chosen.
}
\item{path}{
The path where graphic files should be put if any are produced. Defaults
to "./" i.e. the current working directory of R.
}
\item{fileprefix}{
A string which will form the beginning of each filename, if graphic files are
created. Defaults to "drplot".
}
\item{overlay}{
If TRUE, all output will be put into one graph, otherwise a separate graph
will be created for each substance. In the latter case, on-screen display
(postscript=FALSE) only works correctly for data plots. Dose-response models
will all be put into the last graph in this case.
}
\item{postscript}{
If TRUE, (a) postscript graph(s) will be created. Otherwise, and if
the png argument is also FALSE, graphics will be
displayed with a screen graphics device.
}
\item{png}{
If TRUE, (a) png graph(s) will be created. Otherwise, and if the
postscript argument is also FALSE, graphics will be displayed with a
screen graphics device.
}
\item{bw}{
A boolean deciding if the plots will be black and white or not. Default
is TRUE.
}
\item{colors}{
This is a vector of colors, defaulting to 1:8, used for plotting the data.
}
\item{lpos}{
A optional vector with the x and y position of the upper left corner of the legend. The default guess is not always the optimum.}
\item{devoff}{
If set to FALSE, the closing of the device after creation of an overlay png
or postscript graph will be left out, so texts and other elements can be
added to the graph.
}
}
\value{
\item{results}{
You will get plots of data and/or the fitted dose-response curves, on the
screen and/or as postscript files, depending on the parameters.
}
}
\note{
Treatment of legends is not really well solved. Be sure all devices are
closed (e.g. by calling \code{dev.off()}) before calling \code{drplot}
again after a failure.
}
\examples{
data(antifoul)
r <- drfit(antifoul)
\dontrun{drplot(r,antifoul)}
}
\author{
Johannes Ranke
\email{jranke@uni-bremen.de}
\url{http://www.uft.uni-bremen.de/chemie/ranke}
}
\keyword{models}
\keyword{regression}
\keyword{nonlinear}
