# matched.distances: Determine distances between matched units In markmfredrickson/optmatch: Functions for Optimal Matching

## Description

From a match (as produced by `pairmatch` or `fullmatch`) and a distance, extract the distances of matched units from their matched counterparts.

## Usage

 `1` ```matched.distances(matchobj, distance, preserve.unit.names = FALSE) ```

## Arguments

 `matchobj` Value of a call to `pairmatch` or `fullmatch`. `distance` Either a distance matrix or the value of a call to or `match_on`. `preserve.unit.names` Logical. If TRUE, for each matched set `matched.distances` returns the submatrix of the distance matrix corresponding to it; if FALSE, a vector containing the distances in that submatrix is returned.

## Details

From a match (as produced by `pairmatch` or `fullmatch`) and a distance, extract the distances of matched units from their matched counterparts.

## Value

A list of numeric vectors (or matrices) of distances, one for each matched set. Note that a matched set with 1 treatment and k controls, or with k treatments and 1 control, has k, not k+1, distances.

Ben B. Hansen

## Examples

 ```1 2 3 4 5``` ```data(plantdist) plantsfm <- fullmatch(plantdist) (plantsfm.d <- matched.distances(plantsfm,plantdist,pres=TRUE)) unlist(lapply(plantsfm.d, max)) mean(unlist(plantsfm.d)) ```

markmfredrickson/optmatch documentation built on Jan. 4, 2018, 4:53 a.m.