fields (version 6.8)

bplot: boxplot

Description

Plots boxplots of several groups of data and allows for placement at different horizontal or vertical positions or colors. It is also flexible in the input object, accepting either a list or matrix.

Usage

bplot(x, by, pos=NULL, at = pos, add = FALSE, boxwex =
                 0.8,xlim=NULL, ...)

Details

This function was created as a complement to the usual S function for boxplots. The current function makes it possible to put the boxplots at unequal x or y positions in a rational using the at or pos arguments. This is useful for visually grouping a large set of boxplots into several groups. Also placement of the boxplots with respect to the axis can add information to the plot. Another aspect is the emphasis on data structures for groups of data. One useful feature is the by option to break up the x vector into distinct groups.

The older bplot function drew the boxplots from scratch and if one needs to do this refer to the old functions: describe.bplot, draw.bplot.obj, bplot.xy, bplot.obj

Finally to bin data into groups based on a continuous variable and to make bplots of each group see bplot.xy.

See Also

bplot.xy

Examples

#
set.seed(123)
temp<- matrix( rnorm(12*8), ncol=12)
pos<- c(1:6,9:14)
bplot(temp)
#
par(las=1)
bplot( temp, pos=pos, names=paste( "Data",1:12, sep=""), horizontal=TRUE)

#
# Xmas boxplots in red and green 
bplot( temp, pos=pos,  col=c("red", "green"))
# add an axis on top
axis( 3)