size-methods: Compute interval sizes

In edzer/intervals: Tools for Working with Points and Intervals

Compute interval sizes

Description

Compute the size, in either Z or R as appropriate, for each interval in an interval matrix.

Usage

## S4 method for signature 'Intervals'
size(x, as = type(x))

## S4 method for signature 'Intervals_full'
size(x, as = type(x))

Arguments

x	An "Intervals" or "Intervals_full" object.
as	Should the intervals be thought of as in Z or R? This is usually determined automatically from the type slot, but because changing type may cause object copying, it is sometimes convenient to temporarily override this slot without actually resetting it.

Details

For type "Z" objects, counting measure; for type "R" objects, Lebesgue measure. For type "Z" objects, intervals of form (a,a] and (a,a) are both of length 0.

Value

A numeric vector with length equal to nrow(x).

See Also

See empty to identify empty intervals. Note that when type(x) == "R", a size of 0 does not imply that an interval is empty.

Examples

z1 <- Intervals( cbind( 1, 1:3 ), type = "Z" )
z2 <- z1; closed(z2)[1] <- FALSE
z3 <- z1; closed(z3) <- FALSE

size(z1)
size(z2)
size(z3)

r1 <- z1; type(r1) <- "R"
r2 <- z2; type(r2) <- "R"
r3 <- z3; type(r3) <- "R"

size(r1)
size(r2)
size(r3)

s1 <- Intervals_full( matrix( 1, 3, 2 ), type = "Z" )
closed(s1)[2,2] <- FALSE
closed(s1)[3,] <- FALSE

size(s1)

edzer/intervals documentation built on Sept. 8, 2023, 9:12 p.m.