lattice (version 0.5-4)

panel.functions: Useful Panel Functions

Description

These are predefined panel functions available in Trellis for use in constructing new panel functions (usually on-the-fly).

Usage

panel.abline(a, b, ...)
panel.abline(coef, ...)
panel.abline(reg, ...)
panel.abline(h= ,v= , ...)
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))

Arguments

x, y

numeric variates

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 t

col

color

span, degree, family, evaluation

arguments to loess.smooth in the modreg library. panel.loess is essentially a wrapper on loess.smooth

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 expla

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.

synopsis

panel.abline(a, b = NULL, h = numeric(0), v = numeric(0), col = add.line$col, lty = add.line$lty, lwd = add.line$lwd, ...) panel.linejoin(x, y, fun = mean, horizontal = TRUE, lwd = reference.line$lwd, lty = reference.line$lty, col = reference.line$col, col.line, ...)

Details

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.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.

See Also

loess.smooth, trellis.par.get