locate: Interpolate the locations of values within an ordered vector...

In BigelowLab/locate: locate: interpolating values within ordered vectors

Description

Inpsired by locate() from numerical recipes, findInterval and VALUE_LOCATE() from IDL.

Usage

locate(x, vec, ...)

Arguments

x	vector of values (in any order) including sortable character types
vec	ordered vector (ascending or descending) of same type as x
...	other arguments for sapply

Value

vector of indices ranging from 0 to the length of vec

• 0 indices indicate x values less than the left most value of vec

• For ascending vectors, the index, i, of x is found where vex[i] <= x < vec[i+1] with an open right-hand end

• For descending vectors, the index, i, of x is found where vex[i] >= x > vec[i+1] with an open right-hand end

Examples

## Not run: 
  x <- c(13, 7, 22)
  locate(x, 10:19)
  locate(x, 19:10)
  locate(c("zoo", "dog", "fish", "cat"), letters)
  locate(c("zoo", "dog", "fish", "cat"), letters, USE.NAMES = FALSE)

## End(Not run)

BigelowLab/locate documentation built on Dec. 17, 2021, 10:51 a.m.