InfinitySparseMatrix-class

<code>InfinitySparseMatrix</code> is a special class of distance specifications. Finite entries
indicate possible matches, while infinite or NA entries indicated non-allowed
matches. This data type can be more space efficient for sparse matching
problems.
Usually, users will create distance specification using <code>match_on</code>, <code>caliper</code>, or
<code>exactMatch</code>. The ordering of units in an <code>InfinitySparseMatrix</code> is not guaranteed to be maintained after subsetting and/or other operations are performed.

Distance based bipartite matching using minimum cost flow, oriented
to matching of treatment and control groups in observational studies ('Hansen'
and 'Klopfer' 2006 <doi:10.1198/106186006X137047>). Routines are provided to
generate distances from generalised linear models (propensity score
matching), formulas giving variables on which to limit matched distances,
stratified or exact matching directives, or calipers, alone or in
combination.

Josh Errickson

optmatch

Functions for Optimal Matching

Ben Hansen

Mark Fredrickson

Josh Buckner

Adam Rauh

InfinitySparseMatrix-class function

<dl>
<dt><code>colnames</code></dt>
<dd>vector containing names for all control units. This will either be a character vector or NULL if units have no names</dd></dl>
<dt><code>rownames</code></dt>
<dd>vector containing names for all treated units. This will either be a character vector or NULL if units have no names</dd>
<dt><code>cols</code></dt>
<dd>vector of integers corresponding to control units</dd>
<dt><code>rows</code></dt>
<dd>vector of integers corresponding to treated units</dd>
<dt><code>dimension</code></dt>
<dd>integer vector containing the number of treated and control units, in that order</dd>
<dt><code>call</code></dt>
<dd>function call used to create the <code>InfinitySparseMatrix</code></dd>

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Author

Objects for sparse matching problems. — InfinitySparseMatrix-class

<dl>
<dt><code>colnames</code></dt>
<dd>vector containing names for all control units. This will either be a character vector or NULL if units have no names</dd>


<dt><code>rownames</code></dt>
<dd>vector containing names for all treated units. This will either be a character vector or NULL if units have no names</dd>


<dt><code>cols</code></dt>
<dd>vector of integers corresponding to control units</dd>


<dt><code>rows</code></dt>
<dd>vector of integers corresponding to treated units</dd>


<dt><code>dimension</code></dt>
<dd>integer vector containing the number of treated and control units, in that order</dd>


<dt><code>call</code></dt>
<dd>function call used to create the <code>InfinitySparseMatrix</code></dd>


</dl>

InfinitySparseMatrix-class: Objects for sparse matching problems.

Description

Arguments

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Author

See Also