Functions to handle shingles
shingle(x, intervals=sort(unique(x)))
equal.count(x, ...)
as.shingle(x)
is.shingle(x)# S3 method for shingle
plot(x, panel, xlab, ylab, ...)
# S3 method for shingle
print(x, showValues = TRUE, ...)
# S3 method for shingleLevel
as.character(x, ...)
# S3 method for shingleLevel
print(x, ...)
# S3 method for shingle
summary(object, showValues = FALSE, ...)
# S3 method for shingle
[(x, subset, drop = FALSE)
as.factorOrShingle(x, subset, drop)
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.
numeric variable or R object, shingle in plot.shingle and
x[]. An object (list of intervals) of class "shingleLevel" in
print.shingleLevel
shingle object to be summarized
logical, whether to print the numeric part. If FALSE, only the intervals are printed
numeric vector or matrix with 2 columns
logical vector
whether redundant shingle levels are to be dropped
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.
Deepayan Sarkar Deepayan.Sarkar@R-project.org
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. For use in labelling,
the as.character method can be used to convert levels of a
shingle to character strings.
equal.count converts x to a shingle using the equal
count algorithm. This is 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.
xyplot,
co.intervals, Lattice
z <- equal.count(rnorm(50))
plot(z)
print(z)
print(levels(z))
data.frame(x = equal.count(rnorm(100)), y = rnorm(100))
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