ecdfplot: Trellis Displays of Empirical CDF

Description

Conditional displays of Empirical Cumulative Distribution Functions

Usage

ecdfplot(x, data, ...)
## S3 method for class 'formula':
ecdfplot(x, data,
         prepanel = "prepanel.ecdfplot", 
         panel = "panel.ecdfplot",
         ylab,
         \dots)
## S3 method for class 'numeric':
ecdfplot(x, data = NULL, xlab, \dots)
prepanel.ecdfplot(x, f.value = NULL, ...)
panel.ecdfplot(x, f.value = NULL, type = "s",
               groups = NULL, qtype = 7,
               ref = TRUE,
               ...)

Arguments

For ecdfplot, x is the object on which method dispatch is carried out. For the "formula" method, x is a formula describing the form of conditioning plot, and has to be of the form ~x

data

For the "formula" method, a data frame containing
    values for any variables in the formula, as well as those in
    groups and subset if applicable.

prepanel, panel

panel and prepanel function used to create the
    display.

xlab, ylab

axis labels; typically a character string or an
    expression.

groups

a grouing variable of the same length as x.  If
    specified, ECDF plots are computed for each subset defined by unique
    values of groups and the resulting functions superposed
    within each panel.

f.value, qtype

Defines how quantiles are calculated. See
    panel.qqmath.

ref

logical, whether a reference line should be drawn at 0 and
    1

type

how the plot is rendered; see
    panel.xyplot

...

extra arguments, passed on as appropriate.  Standard
    lattice arguments as well as arguments to panel.ecdfplot
    can be supplied directly in the high level ecdfplot call.

`Value`

ecdfplot produces an object of class "trellis". The
  update method can be used to update components of the object and
  the print method (usually called by default) will plot it on an
  appropriate plotting device.

`See Also`

qqmath for Quantile plots which are
  more generally useful, especially when comparing with a theoretical
  distribution other than uniform.  An ECDF plot is essentially a
  transposed version (i.e., with axes switched) of a uniform quantile
  plot.

`Examples`

Run this codedata(singer, package = "lattice")
ecdfplot(~height | voice.part, data = singer)
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