caliperSize: (Internal) Determines how many other units fall within a...
In optmatch: Functions for Optimal Matching
caliperSize R Documentation
(Internal) Determines how many other units fall within a caliper distance
Description
The matching functions fullmatch and pairmatch
have a maximum problem size, based on the number of comparisons between treated
and control units. For a completely dense problem, in which every treated units
is compared to every control unit there are length(treated) *
length(control) comparisons. A caliper restricts which comparisons are valid,
disallowing matches of treated and control pairs that are too far apart. A
caliper can significantly decrease the size of a matching problem. The
caliperSize function reports exactly who many valid treated-control
comparisons remain after applying a caliper of the given width.
Usage
caliperSize(scores, z, width, structure = NULL)
Arguments
scores
A numeric vector of scores providing 1-D position of units
z
Treatment indicator vector
width
Width of caliper, must be positive
structure
Grouping factor to use in computation
Value
numeric Total number of pairwise distances remaining after the caliper is placed.
optmatch documentation built on Sept. 19, 2024, 9:06 a.m.
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| caliperSize | R Documentation |
(Internal) Determines how many other units fall within a caliper distance
Description
The matching functions fullmatch and pairmatch
have a maximum problem size, based on the number of comparisons between treated
and control units. For a completely dense problem, in which every treated units
is compared to every control unit there are length(treated) *
length(control) comparisons. A caliper restricts which comparisons are valid,
disallowing matches of treated and control pairs that are too far apart. A
caliper can significantly decrease the size of a matching problem. The
caliperSize function reports exactly who many valid treated-control
comparisons remain after applying a caliper of the given width.
Usage
caliperSize(scores, z, width, structure = NULL)
Arguments
scores |
A numeric vector of scores providing 1-D position of units |
z |
Treatment indicator vector |
width |
Width of caliper, must be positive |
structure |
Grouping factor to use in computation |
Value
numeric Total number of pairwise distances remaining after the caliper is placed.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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