optmatch_same_distance {optmatch}

Checks if two distances are equivalent. x and y can be distances (InfinitySparseMatrix, BlockedInfinitySparseMatrix, or DenseMatrix), or they can be optmatch objects.

Description

To save space, optmatch objects merely store a hash of the distance matrix instead of the original object. Any distance objects are hashed before comparison.

Usage

optmatch_same_distance(x, y)

Arguments

x

A distances (InfinitySparseMatrix, BlockedInfinitySparseMatrix, or DenseMatrix), or optmatch object.

y

A distances (InfinitySparseMatrix, BlockedInfinitySparseMatrix, or DenseMatrix), or optmatch object.

Details

Note that the distance is hashed with its call set to NULL. (This avoids issues where, for example, match_on(Z~X, data=d, caliper=NULL) and match_on(Z~X, data=d) produce identical matches but have differing calls.)

Value

Boolean whether the two distance specifications are identical.