panel.functions {lattice}  R Documentation 
These are predefined panel functions available in lattice for use in constructing new panel functions (usually onthefly).
panel.abline(a, b, ...) panel.abline(coef, ...) panel.abline(reg, ...) panel.abline(h= ,v= , ...) panel.curve(expr, from, to, n = 101, curve.type = "l", ...) panel.rug(x = NULL, y = NULL, regular = TRUE, start, end, ...) panel.fill(col="grey", ...) panel.grid(h=3, v=3, ...) panel.lmline(x,y,...) = panel.abline(lm(y~x), ...) panel.loess(x, y, span = 2/3, degree = 1, family = c("symmetric", "gaussian"), evaluation = 50, ...) panel.linejoin(x, y, fun = mean, horizontal = TRUE, ...) panel.mathdensity(dmath = dnorm, args = list(mean=0, sd=1))
x, y 
variables defining the contents of the panel 
a, b 
Coefficients of the line to be added 
coef 
Coefficients of the line to be added as a length 2 vector 
reg 
A regression object. The corresponding fitted line will be drawn 
h,v 
For panel.abline , numerical vectors giving y and x
locations respectively of horizontal and vertical lines to be
added to the plot. For panel.grid, number of horizontal and vertical
reference lines to be added to the plot; h=1 and v=1 make the
grids aligned with the axis labels (this doesn't always work).

expr 
expression as a function of x or a function to plot as a curve 
n 
the number of points to use for drawing the curve 
regular 
logical indicating whether `rug' to be drawn on the regular side (left / bottom) or not (right / top) 
start, end 
endpoints of rug segments, in normalized parent coordinates (between 0 and 1). Defaults depend on value of regular, and cover 3% of the panel width and height 
from, to 
optional lower and upper xlimits of curve. If missing, limits of current panel are used 
curve.type 
type of curve ('p' for points, etc), passed to
llines

col 
color 
span, degree, family, evaluation 
arguments to
loess.smooth , around which panel.loess is essentially
a wrapper

fun 
the function that will be applied to the subset of x(y) determined by the unique values of y(x) 
horizontal 
logical. If FALSE, the plot is `transposed' in the
sense that the behaviours of x and y are switched. x is now
the `factor'. Interpretation of other arguments change
accordingly. See documentation of bwplot for a fuller
explanation.

dmath 
A vectorized function that produces density values
given a numeric vector named x , e.g., dnorm 
args 
list giving additional arguments to be passed to dmath 
... 
graphical parameters can be supplied. see function
definition for details. Color can usually be specified by col,
col.line and col.symbol , the last two overriding the first
for lines and points respectively.

panel.abline
adds a line of the form y=a+bx
or vertical
and/or horizontal lines. Graphical parameters are obtained from
reference.line
for panel.grid, and add.line
for the
others (can be set using trellis.par.set
)
panel.curve
adds a curve, similar to what curve
does
with add = TRUE
. Graphical parameters for the line are obtained
from the add.line
setting.
panel.linejoin
treats one of x and y as a factor (according to
the value of horizontal
, calculates fun
applied to the
subsets of the other variable determined by each unique value of the
factor, and joins them by a line. Can be used in conjunction with
panel.xyplot
and more commonly with panel.superpose to produce
interaction plots. See xyplot
documentation for an example.
panel.mathdensity
plots a (usually theoretical) probability
density function. Can be useful in conjunction with histogram
and densityplot
to visually estimate goodness of fit.
Deepayan Sarkar Deepayan.Sarkar@Rproject.org
loess.smooth
,
panel.axis
, panel.identify
identify
, trellis.par.get