InfinitySparseMatrix-class function

Objects for sparse matching problems.

InfinitySparseMatrix 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 match_on, caliper, or exactMatch. The ordering of units in an InfinitySparseMatrix is not guaranteed to be maintained after subsetting and/or other operations are performed. class

Slots

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

See Also

match_on, caliper, exactMatch, fullmatch, pairmatch

Author(s)

Mark M. Fredrickson