panel.superpose: Panel Function for Display Marked by groups
Description
This is an useful panel function for trellis displays. Uses a grouping
variable, plotting the x and y variables with different
graphical properties for each distinct value of the grouping variable.Usage
panel.superpose(x, y, subscripts, groups, type="p", ...)
Arguments
x,y
coordinates of the points to be displayed
subscripts
subscripts giving indices in original data frame
groups
a grouping variable. Different graphical parameters
will be used for each distinct value of groups. The default
graphical parameters are obtained from superpose.symbol and
superpose.line using
type
character vector specifying what should be drawn for each group. See
panel.xyplot for details. See xyplot
documentation for an example. ...
other arguments (mostly graphical parameters, replicated
to be as long as the number of groups), ultimately passed down to
panel.xyplot. In particular, colour can be specified using 3
arguments (col, col.line, col.symbol
synopsis
panel.superpose(x, y, subscripts, groups,
col,
col.line = superpose.line$col,
col.symbol = superpose.symbol$col,
pch = superpose.symbol$pch,
cex = superpose.symbol$cex,
lty = superpose.line$lty,
lwd = superpose.line$lwd,
...)