panel.ebars.grouped: Compute groupwise standard deviations and plot errorbars...
In claus-e-andersen/clanLattice: R functions for lattice plotting

panel.ebars.grouped

R Documentation

Compute groupwise standard deviations and plot errorbars (lattice panel)

Description

This function has been designed for plotting of errorbars in lattice plots. This is an alternative to the more complex panel-function called panel.binned.errorbars. Example:

N <- 50

df <- data.frame(degC = sample(20:25,N,replace=TRUE),counts=NA,instrument=sample(c("Fluke","HP"),N,replace=TRUE))

df$counts <- df$degC * 1.1 + rnorm(nrow(df),mean=0,sd=0.3)

xyplot(counts ~ degC|instrument, data=df, panel=function(x,y,...){ panel.xyplot(x,y,...); panel.ebars.grouped(x,y,type="sd",err.type="b",err.col="red",err.pch=16,err.cex=0.8,err.lwd=1,err.width=1.2,err.offset=0) })

See also panel.binned.errorbars, panel.binned.errorbars, panel.ebars and panel.ebars2.

Usage

See above

Arguments

`x`	= x-coordinate for the data points.
`y`	= y-coordinate for the data points.
`type`	(only one option is available, "sd").
`err.col`	is the color of the error bar (and mean symbol)
`err.type`	is the type of plot for the mean values (e.g. "n", "p", or "b").
`err.pch`	is the plotting symbol for mean values.
`err.cex`	is the size of the plotting symbol for the mean values.
`err.lwd`	is the line width for the error bars.
`err.width`	is the width of the error bars (i.e. the wiskers) in mm.
`err.offsetis`	an offset for the error bar relative to the mean (x).