isOrdered: Check If A Vector Is Ordered

In xts: eXtensible Time Series

Check If A Vector Is Ordered

Description

Check if a vector is strictly increasing, strictly decreasing, not decreasing, or not increasing.

Usage

isOrdered(x, increasing = TRUE, strictly = TRUE)

Arguments

x	A numeric vector.
increasing	Test for increasing (TRUE) or decreasing (FALSE) values?
strictly	When TRUE, vectors with duplicate values are not considered ordered.

Details

Designed for internal use with xts, this provides highly optimized tests for ordering.

Value

A logical scalar indicating whether or not x is ordered.

Author(s)

Jeffrey A. Ryan

See Also

is.unsorted()

Examples

# strictly increasing
isOrdered(1:10, increasing=TRUE)
isOrdered(1:10, increasing=FALSE)
isOrdered(c(1,1:10), increasing=TRUE)
isOrdered(c(1,1:10), increasing=TRUE, strictly=FALSE)

# decreasing
isOrdered(10:1, increasing=TRUE)
isOrdered(10:1, increasing=FALSE)

xts documentation built on Oct. 16, 2024, 1:08 a.m.