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

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

colZeros(x)

rowZeros(x)

`x`	Matrix object

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

[Package proxyC version 0.2.2 Index]