agree_C: Fast C++ implementation of agreement vector for the...
In borishejblum/ludic: Linkage Using Diagnosis Codes

agree_C_sparse uses sparse matrices.

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agree_C(mat_A, mat_B)

agree_C_sparse(mat_A, mat_B)

`mat_A`	a `nB x K` matrix of the observations to be matched. Must be integers.
`mat_B`	a `nA x K` matrix of the database into which a match is looked for. Must be integers.

mat1 <- matrix(round(rnorm(n=1000, sd=1.2)), ncol=10, nrow=100)
mat2 <- rbind(mat1[1:10, ],
             matrix(round(rnorm(n=900, sd=1.2)), ncol=10, nrow=90)
             )
rownames(mat1) <- paste0("A", 1:nrow(mat1))
rownames(mat1) <- paste0("B", 1:nrow(mat1))
mat1 <- 1*(mat1>1)
mat2 <- 1*(mat2>1)