R: Count number of zeros in columns and rows in sparse matrix

colZeros {proxyC} | R Documentation

## Count number of zeros in columns and rows in sparse matrix

### Description

Produces the same result as applying `sum(x == 0)` to each row or column.

### Usage

    colZeros(x)

    rowZeros(x)

### Arguments

`x` | Matrix object

### Examples

    mt <- Matrix::rsparsematrix(100, 100, 0.01)
    colZeros(mt)
    apply(mt, 2, function(x) sum(x == 0)) # the same

[Package proxyC version 0.1.5 Index]