% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/plot_RadialPlot.R
\name{plot_RadialPlot}
\alias{plot_RadialPlot}
\title{Function to create a Radial Plot}
\usage{
plot_RadialPlot(
  data,
  na.rm = TRUE,
  log.z = TRUE,
  central.value = NULL,
  centrality = "mean.weighted",
  mtext = "",
  summary = c("n", "in.2s"),
  summary.pos = "sub",
  legend = NULL,
  legend.pos = "topright",
  stats = "none",
  rug = FALSE,
  plot.ratio = NULL,
  bar.col = NULL,
  y.ticks = TRUE,
  grid.col = NULL,
  line = NULL,
  line.col = NULL,
  line.label = NULL,
  ...
)
}
\arguments{
\item{data}{\link{data.frame} or \linkS4class{RLum.Results} object (\strong{required}):
for \code{data.frame}: either two columns: De (\code{data[,1]}) and De error
(\code{data[,2]}), or one: De (\code{values[,1]}). If a single-column data frame
is provided, De error is assumed to be 10^-9 for all measurements.
To plot several data sets in one plot, the data sets must be provided as
\code{list}, e.g. \code{list(data.1, data.2)}.}

\item{na.rm}{\link{logical} (\emph{with default}):
excludes \code{NA} values from the data set prior to any further operations.}

\item{log.z}{\link{logical} (\emph{with default}):
Option to display the z-axis in logarithmic scale. Default is \code{TRUE}.}

\item{central.value}{\link{numeric} (\emph{optional}):
User-defined central value, primarily used for horizontal centring
of the z-axis.}

\item{centrality}{\link{character} or \link{numeric} (\emph{with default}):
measure of centrality, used for automatically centring the plot and drawing
the central line. Can either be one out of
\itemize{
\item \code{"mean"},
\item \code{"median"},
\item \code{"mean.weighted"} and
\item \code{"median.weighted"} or a
\item numeric value used for the standardisation.
}}

\item{mtext}{\link{character} (\emph{with default}):
additional text below the plot title.}

\item{summary}{\link{character} (\emph{with default}):
add statistic measures of centrality and dispersion to the plot.
Can be one or more of several keywords. See details for available keywords.}

\item{summary.pos}{\link{numeric} or \link{character} (\emph{with default}):
optional position coordinates or keyword (e.g. \code{"topright"})
for the statistical summary. Alternatively, the keyword \code{"sub"} may be
specified to place the summary below the plot header. However, this latter
option is only possible if \code{mtext} is not used.}

\item{legend}{\link{character} vector (\emph{optional}):
legend content to be added to the plot.}

\item{legend.pos}{\link{numeric} or \link{character} (\emph{with default}):
optional legend position coordinates or keyword (e.g. \code{"topright"}).}

\item{stats}{\link{character} (\emph{optional}):
additional labels of statistically important values in the plot. It can be
one or more of \code{"min"}, \code{"max"} and \code{"median"}; any other values will be
ignored.}

\item{rug}{\link{logical}:
Option to add a rug to the z-scale, to indicate the location of individual values}

\item{plot.ratio}{\link{numeric}:
User-defined plot area ratio (i.e. curvature of the z-axis). If omitted,
the default value (\code{4.5/5.5}) is used and modified automatically to optimise
the z-axis curvature. The parameter should be decreased when data points
are plotted outside the z-axis or when the z-axis gets too elliptic.}

\item{bar.col}{\link{character} or \link{numeric} (\emph{with default}):
colour of the bar showing the 2-sigma range around the central
value. To disable the bar, use \code{"none"}. Default is \code{"grey80"}.}

\item{y.ticks}{\link{logical}:
Option to hide y-axis labels. Useful for data with small scatter.}

\item{grid.col}{\link{character} or \link{numeric} (\emph{with default}):
colour of the grid lines (originating at \verb{[0,0]} and stretching to
the z-scale). To disable grid lines, use \code{"none"}. Default is \code{"grey70"}.}

\item{line}{\link{numeric}:
numeric values of the additional lines to be added.}

\item{line.col}{\link{character} or \link{numeric}:
colour of the additional lines.}

\item{line.label}{\link{character}:
labels for the additional lines.}

\item{...}{Further plot arguments to pass. \code{xlab} must be a vector of
length 2, specifying the upper and lower x-axes labels.}
}
\value{
Returns a plot object.
}
\description{
A Galbraith's radial plot is produced on a logarithmic or a linear scale.
}
\details{
Details and the theoretical background of the radial plot are given in the
cited literature. This function is based on an S script of Rex Galbraith. To
reduce the manual adjustments, the function has been rewritten. Thanks to
Rex Galbraith for useful comments on this function. \cr
Plotting can be disabled by adding the argument \code{plot = "FALSE"}, e.g.
to return only numeric plot output.

Earlier versions of the Radial Plot in this package had the 2-sigma-bar
drawn onto the z-axis. However, this might have caused misunderstanding in
that the 2-sigma range may also refer to the z-scale, which it does not!
Rather it applies only to the x-y-coordinate system (standardised error vs.
precision). A spread in doses or ages must be drawn as lines originating at
zero precision (x0) and zero standardised estimate (y0). Such a range may be
drawn by adding lines to the radial plot ( \code{line}, \code{line.col},
\code{line.label}, cf. examples).

A statistic summary, i.e. a collection of statistic measures of
centrality and dispersion (and further measures) can be added by specifying
one or more of the following keywords:
\itemize{
\item \code{"n"} (number of samples),
\item \code{"mean"} (mean De value),
\item \code{"mean.weighted"} (error-weighted mean),
\item \code{"median"} (median of the De values),
\item \code{"median.weighted"} (error-weighted median),
\item \code{"sdrel"} (relative standard deviation in percent),
\item \code{"sdrel.weighted"} (error-weighted relative standard deviation in percent),
\item \code{"sdabs"} (absolute standard deviation),
\item \code{"sdabs.weighted"} (error-weighted absolute standard deviation),
\item \code{"serel"} (relative standard error),
\item \code{"serel.weighted"} (error-weighted relative standard error),
\item \code{"seabs"} (absolute standard error),
\item \code{"seabs.weighted"} (error-weighted absolute standard error),
\item \code{"in.2s"} (percent of samples in 2-sigma range),
\item \code{"kurtosis"} (kurtosis) and
\item \code{"skewness"} (skewness).
}
}
\section{Function version}{
 0.5.11
}

\examples{

## load example data
data(ExampleData.DeValues, envir = environment())
ExampleData.DeValues <- convert_Second2Gray(
  ExampleData.DeValues$BT998, c(0.0438,0.0019))

## plot the example data straightforward
plot_RadialPlot(data = ExampleData.DeValues)

## now with linear z-scale
plot_RadialPlot(
  data = ExampleData.DeValues,
  log.z = FALSE)

## store the the plot parameters
plot1 <- plot_RadialPlot(
  data = ExampleData.DeValues,
  log.z = FALSE)
plot1
plot1$zlim

## now with adjusted z-scale limits
plot_RadialPlot(
  data = ExampleData.DeValues,
  log.z = FALSE,
  xlim = c(0, 5),
  zlim = c(100, 200))

## now the two plots with serious but seasonally changing fun
#plot_RadialPlot(data = data.3, fun = TRUE)

## now with user-defined central value, in log-scale again
plot_RadialPlot(
  data = ExampleData.DeValues,
  central.value = 150)

## now with a rug, indicating individual De values at the z-scale
plot_RadialPlot(
  data = ExampleData.DeValues,
  rug = TRUE)

## now with legend, colour, different points and smaller scale
plot_RadialPlot(
  data = ExampleData.DeValues,
  legend = "Sample 1",
  col = "tomato4",
  bar.col = "peachpuff",
  pch = "R",
  cex = 0.8)

## now without 2-sigma bar, y-axis, grid lines and central value line
plot_RadialPlot(
  data = ExampleData.DeValues,
  bar.col = "none",
  grid.col = "none",
  y.ticks = FALSE,
  lwd = 0)

## now with user-defined axes labels
plot_RadialPlot(
  data = ExampleData.DeValues,
  xlab = c("Data error (\%)", "Data precision"),
  ylab = "Scatter",
  zlab = "Equivalent dose [Gy]")

## now with minimum, maximum and median value indicated
plot_RadialPlot(
  data = ExampleData.DeValues,
  central.value = 150,
  stats = c("min", "max", "median"))

## now with a brief statistical summary
plot_RadialPlot(
  data = ExampleData.DeValues,
  summary = c("n", "in.2s"))

## now with another statistical summary as subheader
plot_RadialPlot(
  data = ExampleData.DeValues,
  summary = c("mean.weighted", "median"),
  summary.pos = "sub")

## now the data set is split into sub-groups, one is manipulated
data.1 <- ExampleData.DeValues[1:15,]
data.2 <- ExampleData.DeValues[16:25,] * 1.3

## now a common dataset is created from the two subgroups
data.3 <- list(data.1, data.2)

## now the two data sets are plotted in one plot
plot_RadialPlot(data = data.3)

## now with some graphical modification
plot_RadialPlot(
  data = data.3,
  col = c("darkblue", "darkgreen"),
  bar.col = c("lightblue", "lightgreen"),
  pch = c(2, 6),
  summary = c("n", "in.2s"),
  summary.pos = "sub",
  legend = c("Sample 1", "Sample 2"))

} 

\section{How to cite}{
Dietze, M., Kreutzer, S., 2025. plot_RadialPlot(): Function to create a Radial Plot. Function version 0.5.11. In: Kreutzer, S., Burow, C., Dietze, M., Fuchs, M.C., Schmidt, C., Fischer, M., Friedrich, J., Mercier, N., Philippe, A., Riedesel, S., Autzen, M., Mittelstrass, D., Gray, H.J., Galharret, J., Colombo, M., Steinbuch, L., Boer, A.d., 2025. Luminescence: Comprehensive Luminescence Dating Data Analysis. R package version 1.1.2. https://r-lum.github.io/Luminescence/
}

\references{
Galbraith, R.F., 1988. Graphical Display of Estimates Having
Differing Standard Errors. Technometrics, 30 (3), 271-281.

Galbraith, R.F., 1990. The radial plot: Graphical assessment of spread in
ages. International Journal of Radiation Applications and Instrumentation.
Part D. Nuclear Tracks and Radiation Measurements, 17 (3), 207-214.

Galbraith, R. & Green, P., 1990. Estimating the component ages in a finite
mixture. International Journal of Radiation Applications and
Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 17 (3)
197-206.

Galbraith, R.F. & Laslett, G.M., 1993. Statistical models for mixed fission
track ages. Nuclear Tracks And Radiation Measurements, 21 (4), 459-470.

Galbraith, R.F., 1994. Some Applications of Radial Plots. Journal of the
American Statistical Association, 89 (428), 1232-1242.

Galbraith, R.F., 2010. On plotting OSL equivalent doses. Ancient TL, 28 (1),
1-10.

Galbraith, R.F. & Roberts, R.G., 2012. Statistical aspects of equivalent
dose and error calculation and display in OSL dating: An overview and some
recommendations. Quaternary Geochronology, 11, 1-27.
}
\seealso{
\link{plot}, \link{plot_KDE}, \link{plot_Histogram}, \link{plot_AbanicoPlot}
}
\author{
Michael Dietze, GFZ Potsdam (Germany)\cr
Sebastian Kreutzer, Institute of Geography, Heidelberg University (Germany)\cr
Based on a rewritten S script of Rex Galbraith, 2010
, RLum Developer Team}
