# SymbLegend: Plot Legend In StatDA: Statistical Analysis for Environmental Data

## Description

Plots symbols and Legend on a map. There are two different methods (percentile symbols or boxplot symbols) to display the legend.

## Usage

 ```1 2 3 4``` ```SymbLegend(X, Y, z, type = "percentile", qutiles = c(0, 0.05, 0.25, 0.75, 0.95, 1), q = NULL, symbtype = "EDA", symbmagn = 0.8, leg.position = "topright", leg.title = "", leg.title.cex = 0.8, leg.round = 2, leg.wid = 4, leg.just = "right", cex.scale = 0.8, xf = 9000, logscale = TRUE, accentuate = FALSE) ```

## Arguments

 `X` X-coordinates `Y` Y-coordinates `z` values on the coordinates `type` "percentile" for percentile legend, "boxplot" for boxplot legend `qutiles` considered quantiles if type="percentile" is used `q` if not NULL, provide manually data points where to break `symbtype` type of symbols to be used; "EDA", "EDAacc", "EDAacc2", "EDAext", "GSC" or "arbit" `symbmagn` magnification factor for symbols `leg.position` position of the legend, either character like "topright" or coordinates `leg.title` title for legend `leg.title.cex` cex for legend `leg.round` round legend to specified digits "pretty" `leg.wid` width (space in numbers) for legend `leg.just` how to justify the legend `cex.scale` cex for text "log-scale" and for boxplot legend - only for type="boxplot" `xf` x-distance from boxplot to number for legend `logscale` if TRUE a log scale is used (for boxplot scale) and the log-boxplot is computed `accentuate` if TRUE, accentuated symbols are used (here only EDA accentuated!)

## Details

It is possible to choose between different methods for calculating the range of the values for the different symbols.

If type="percentile" the pre-determined quantiles of the data are computed and are used to plot the symbols. If type="boxplot" a boxplot is computed and the values were taken to group the values fot the plot and the legend. In the case that a log scale is used the function boxplotlog is used instead of boxplot.

## Author(s)

Peter Filzmoser <P.Filzmoser@tuwien.ac.at> http://cstat.tuwien.ac.at/filz/

## References

C. Reimann, P. Filzmoser, R.G. Garrett, and R. Dutter: Statistical Data Analysis Explained. Applied Environmental Statistics with R. John Wiley and Sons, Chichester, 2008.

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```data(chorizon) data(kola.background) el=chorizon[,"As"] X=chorizon[,"XCOO"] Y=chorizon[,"YCOO"] plot(X,Y,frame.plot=FALSE,xaxt="n",yaxt="n",xlab="",ylab="",type="n") plotbg(map.col=c("gray","gray","gray","gray"),add.plot=TRUE) SymbLegend(X,Y,el,type="percentile",qutiles<-c(0,0.05,0.25,0.75,0.95,1),symbtype="EDA", symbmagn=0.8,leg.position="topright",leg.title="As [mg/kg]",leg.title.cex=0.8,leg.round=2, leg.wid=4,leg.just="right") ```

StatDA documentation built on March 13, 2020, 2:42 a.m.