set_operations: Set operations on number line objects

In diyar: Record Linkage and Epidemiological Case Definitions in 'R'

Set operations on number line objects

Description

Perform set operations on a pair of [number_line]s.

Usage

union_number_lines(x, y)

intersect_number_lines(x, y)

subtract_number_lines(x, y)

Arguments

x	[number_line]
y	[number_line]

Details

union_number_lines() - Combined the range of x and that of y

intersect_number_line() - Subset of x that overlaps with y and vice versa

subtract_number_lines() - Subset of x that does not overlap with y and vice versa.

The direction of the returned [number_line] will be that of the widest one (x or y). If x and y have the same length, it'll be an "increasing" direction.

If x and y do not overlap, NA ("NA ?? NA") is returned.

Value

[number_line]; list

See Also

number_line; overlaps

Examples

nl_1 <- c(number_line(1, 5), number_line(1, 5), number_line(5, 9))
nl_2 <- c(number_line(1, 2), number_line(2, 3), number_line(0, 6))

# Union
nl_1; nl_2; union_number_lines(nl_1, nl_2)


nl_3 <- number_line(as.Date(c("01/01/2020", "03/01/2020","09/01/2020"), "%d/%m/%Y"),
                    as.Date(c("09/01/2020", "09/01/2020","25/12/2020"), "%d/%m/%Y"))

nl_4 <- number_line(as.Date(c("04/01/2020","01/01/2020","01/01/2020"), "%d/%m/%Y"),
                    as.Date(c("05/01/2020","05/01/2020","03/01/2020"), "%d/%m/%Y"))

# Intersect
nl_3; nl_4; intersect_number_lines(nl_3, nl_4)

# Subtract
nl_3; nl_4; subtract_number_lines(nl_3, nl_4)

diyar documentation built on Nov. 13, 2023, 1:08 a.m.