nonzero {DAPAR} | R 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)

[Package DAPAR version 1.18.5 Index]