Binarize matrix by top-k values per column

Source: R/solvers.R

Keeps only the top top values in each column of a matrix, setting others to 0.

binarizeTop(Z, top, keepVals = TRUE)

Arguments

Z

A numeric matrix.

top

Number of top entries to keep in each column.

keepVals

If TRUE, retains original values above the cutoff; otherwise, sets them to 1.

Value

A modified matrix with only top entries retained per column.