panel.superpose {lattice} | R Documentation

## Panel Function for Display Marked by groups

### Description

These are panel functions for Trellis displays useful when a grouping variable is specified for use within panels. The `x` (and `y` where appropriate) variables are plotted with different graphical parameters for each distinct value of the grouping variable.

### Usage

    panel.superpose(x, y, panel.groups = "panel.xyplot",
                    subscripts, groups, type="p", ...)
    panel.superpose.2(x, y, panel.groups = "panel.xyplot",
                      subscripts, groups, type="p", ...)

### Arguments

`x,y` | coordinates of the points to be displayed
`panel.groups` | the panel function to be used for each group of points. Defaults to `panel.xyplot` (behaviour in S)
`subscripts` | subscripts giving indices in original data frame
`groups` | a grouping variable. Different graphical parameters will be used to plot the subsets of observations given by each distinct value of `groups`. The default graphical parameters are obtained from `superpose.symbol` and `superpose.line` using `trellis.par.get` wherever appropriate

`type`

usually a character vector specifying what should be drawn for each group, passed on to the `panel.groups` function, which must know what to do with it. By default, this is `panel.xyplot`, whose help page describes the admissible values.
The two functions `panel.superpose` and `panel.superpose.2` differ only in the way the `type` argument is interpreted. For the former, the interpretation is the same as for `panel.xyplot` for each of the unique groups. In other words, if `type` is a vector, all the individual components are honoured concurrently. For the latter, `type` is replicated to be as long as the number of unique values in `groups`, and one component used for the points corresponding to the each different group. Even in this case, it is possible to request multiple types per group, specifying `type` as a list, each component being the desired `type` vector for the corresponding plot.

`...` | 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` and `col.symbol`), as described in `panel.xyplot`.

### Author(s)

Deepayan Sarkar Deepayan.Sarkar@R-project.org (`panel.superpose.2` originally contributed by Neil Klepeis)

### See Also

Different functions when used as `panel.groups` gives different types of plots, for example `panel.xyplot`, `panel.dotplot` and `panel.linejoin` (This can be used to produce interaction plots).

[Package lattice version 0.11-8 Index]