nonzero: Retrieve the indices of non-zero elements in sparse matrices

View source: R/utils.R

nonzeroR Documentation

Retrieve the indices of non-zero elements in sparse matrices

Description

This function retrieves the indices of non-zero elements in sparse matrices of class dgCMatrix from package Matrix. This function is largely inspired from the package RINGO

Usage

nonzero(x)

Arguments

x

A sparse matrix of class dgCMatrix

Value

A two-column matrix

Author(s)

Samuel Wieczorek

Examples

library(Matrix)
mat <- Matrix(c(0,0,0,0,0,1,0,0,1,1,0,0,0,0,1),nrow=5, byrow=TRUE, 
sparse=TRUE)
res <- nonzero(mat)


samWieczorek/DAPAR documentation built on May 6, 2022, 5:30 p.m.