(Internal) Helper function to create an InfinitySparseMatrix from a set of scores, a treatment indicator, and a caliper width.

(Internal) Helper function to create an InfinitySparseMatrix from a set of scores, a treatment indicator, and a caliper width.

Usage

scoreCaliper(x, z, caliper, within = NULL)

Arguments

x

The scores, a vector indicating the 1-D location of each unit.

z

The treatment assignment vector (same length as x)

caliper

The width of the caliper with respect to the scores x.

within

A valid distance specification, such as the result of exactMatch or caliper. Finite entries indicate which distances to create. Including this argument can significantly speed up computation for sparse matching problems. Specify this filter either via within or via strata elements of a formula; mixing these methods will fail.

Value

An InfinitySparseMatrix object, suitable to be passed to match_on as an within argument.