collapse_sparse_rows: Collapse sparse matrix rows by group

In thisutils: Collection of Utility Functions for Data Analysis and Computing

Collapse sparse matrix rows by group

Description

Collapse sparse matrix rows by group

Usage

collapse_sparse_rows(matrix, group)

Arguments

matrix	A sparse matrix.
group	A vector defining the output row groups.

Value

A sparse matrix with rows collapsed by 'group'.

Examples

mat <- Matrix::Matrix(
  matrix(c(1, 0, 2, 0, 3, 4), nrow = 3, byrow = TRUE),
  sparse = TRUE
)
collapse_sparse_rows(mat, c("g1", "g1", "g2"))

thisutils documentation built on May 24, 2026, 5:07 p.m.