| shingles {lattice} | R Documentation |
Functions to handle shingles
shingle(x, intervals=sort(unique(x))) equal.count(x, ...) as.shingle(x) is.shingle(x) ## S3 method for class 'shingle': plot(x, panel, xlab = "Range", ylab = "Panel", ...) ## S3 method for class 'shingle': print(x, showValues = TRUE, ...) ## S3 method for class 'shingleLevel': print(x, ...) ## S3 method for class 'shingle': summary(object, ...) ## S3 method for class 'shingle': as.data.frame(x, row.names = NULL, optional = FALSE) ## S3 method for class 'shingle': x[subset, drop = FALSE] as.factorOrShingle(x, subset, drop)
x |
numeric variable or R object, shingle in plot.shingle and
x[]. An object (list of intervals) of class "shingleLevel" in
print.shingleLevel
|
object |
shingle object to be summarized |
showValues |
logical, whether to print the numeric part. If FALSE, only the intervals are printed |
row.names |
a character vector giving the row names for the data frame |
optional |
logical. If TRUE, setting row names is optional
|
intervals |
numeric vector or matrix with 2 columns |
subset |
logical vector |
drop |
whether redundant shingle levels are to be dropped |
panel, xlab, ylab |
standard Trellis arguments (see
xyplot ) |
... |
other arguments, passed down as appropriate. For
example, extra arguments to equal.count are passed on to
co.intervals. graphical parameters can be passed as
arguments to the plot method.
|
A shingle is a data structure used in Trellis, and is a generalization
of factors to ‘continuous’ variables. It consists of a numeric
vector along with some possibly overlapping intervals. These intervals
are the ‘levels’ of the shingle. The levels and
nlevels functions, usually applicable to factors, also work on
shingles. The implementation of shingles is slightly different from
S.
There are print methods for shingles, as well as for printing the
result of levels() applied to a shingle.
equal.count converts x to a shingle. Essentially a
wrapper around co.intervals. All arguments are passed to
co.intervals
shingle creates a shingle using the given intervals. If
intervals is a vector, these are used to form 0 length
intervals.
as.shingle returns shingle(x) if x is not a
shingle.
is.shingle tests whether x is a shingle.
plot.shingle displays the ranges of shingles via
rectangles. print.shingle and summary.shingle describe
the shingle object.
x$intervals for levels.shingle(x),
logical for is.shingle, an object of class "trellis" for
plot (printed by default by print.trellis), and
an object of class "shingle" for the others.
Deepayan Sarkar Deepayan.Sarkar@R-project.org
z <- equal.count(rnorm(50)) plot(z) print(z) print(levels(z))