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Count entries in long format data frame and return as a sparse matrix

Source: R/zorn_aggr.R
CountDataFrameToSparseMatrix.Rd

Count entries in long format data frame and return as a sparse matrix

Usage

CountDataFrameToSparseMatrix(dat, rowname, colname)

Arguments

dat

A data.frame

rowname

Column to use as matrix row name

colname

Column to use as matrix column name

Value

A dgCMatrix sparse matrix