panel.pairs {lattice}  R Documentation 
This is the default superpanel function for splom
.
panel.pairs(z, panel = "panel.splom", lower.panel = panel, upper.panel = panel, diag.panel = "diag.panel.splom", as.matrix = FALSE, groups = NULL, panel.subscripts, subscripts, 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 equallyspaced 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 2vector specifying axis limits (should be made more flexible at some point to handle factors) These are specifications on a pervariable 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 pervariable 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 Deepayan.Sarkar@Rproject.org