matchClosest: matchClosest
In twMisc: Utility functions of tw

Description Usage Arguments Details Value Author(s) See Also Examples

Find index in b that is closest to a.

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matchClosest(a, b, maxAbsDiff = Inf, isSortedA = FALSE, 
    isSortedB = FALSE, allFiniteB = FALSE, chunkSize = round(length(b)/length(a) * 
        1.6))

`a`	numeric vector
`b`	numeric vector
`maxAbsDiff`	if maximum difference between best b and a[i] is larger than this, return NA for index i
`isSortedA`	if TRUE assures that A is sorted to speed up
`isSortedB`	if TRUE assures that B is sorted to speed up
`allFiniteB`	if TRUE assures that B contains only finite entries to speed up
`chunkSize`	length of the vector to calculate difference for each point in a

For each a_i the c_i=j will be selected so that b_j is closest to a_i among all b If a_i is not finite, then c_i is NA

vector of length of a, with each element holding an index from b

Thomas Wutzler

twMisc

a = seq(0,1,length.out=11)
b = sort(runif(length(a)))
#mtrace(matchClosest)
c = matchClosest(a,b,isSortedA=TRUE,isSortedB=TRUE)

plot(b~a)
points(b[c]~a, col="red", pch=2)
abline(0,1)