panel.pairs {lattice}R Documentation

Default Superpanel Function for splom


This is the default superpanel function for splom.


            panel = "panel.splom",
            lower.panel = panel,
            upper.panel = panel,
            diag.panel = "diag.panel.splom",
            as.matrix = FALSE,
            groups = NULL,
            pscales = 5,
            prepanel.limits = function(x) if (is.factor(x)) levels(x) else
            extend.limits(range(as.numeric(x), na.rm = TRUE)),
diag.panel.splom(varname, limits, at, lab, draw = TRUE, ...)


z The data frame used for the plot.
panel, lower.panel, upper.panel The panel function used to display each pair of variables. If specified, lower.panel and upper.panel are used for panels below and above the diagonal respectively.
diag.panel The panel function used for the diagonals. See arguments to diag.panel.splom to know what arguments this function is passed when called.
as.matrix logical. If TRUE, the layout of the panels will have origin on the top left instead of bottom left (similar to pairs). This is in essence the same functionality as provided by as.table for the panel layout
groups Grouping variable, if any
panel.subscripts logical specifying whether the panel function accepts an argument named subscripts.
subscripts The indices of the rows of z that are to be displayed in this (super)panel.
pscales Controls axis labels, passed down from splom. If pscales is a single number, it indicates the approximate number of equally-spaced ticks that should appear on each axis. If pscales is a list, it should have p components, each of which is itself a list with the following valid components:
at: a numeric vector specifying tick locations
labels: character vector labels to go with at
limits: numeric 2-vector specifying axis limits (should be made more flexible at some point to handle factors)
These are specifications on a per-variable basis, and used on all four sides in the diagonal cells used for labelling.
Factor variables are labelled with the factor names. Use pscales=0 to supress the axes entirely.
prepanel.limits The `regular' high level lattice plots such as xyplot use the prepanel function for deciding on axis limits from data. This function serves a similar function, and works on a per-variable basis, by calculating the limits, which can be overridden by the corresponding limits component in the pscales list.
varname (scalar) character string or expression that is to be written centred within the panel
limits numeric of length 2, or, vector of characters, specifying the scale for that panel (used to calculate tick locations when missing)
at locations of tick marks
lab optional labels for tick marks
draw logical, specifying whether to draw the tick marks and labels. If FALSE, only variable names are written
... extra arguments, typically graphical parameters to control appearance of axes and variable names in the diagonal panels. The actual list of possible arguments is rather large, see the formal arguments to panel.pairs and panel.diag.splom (using formals) for all the possibilities.


This is the function that is actually passed in as the panel function in a trellis object produced by splom (taking the `panel' function as its argument).


Deepayan Sarkar

See Also


[Package lattice version 0.11-6 Index]