R: Standard deviasion of columns and rows in sparse matrix

colSds {proxyC} | R Documentation

## Standard deviasion of columns and rows in sparse matrix

### Description

Produces the same result as `apply(x, 1, sd)` or `apply(x, 2, sd)` as without coecirng matrix to dense matrix. Values are not identical to `sd` because of the floating point precision issue in C++.

### Usage

    colSds(x)

    rowSds(x)

### Arguments

`x` | Matrix object

### Examples

    mt <- Matrix::rsparsematrix(100, 100, 0.01)
    colSds(mt)
    apply(mt, 2, sd) # the same

[Package proxyC version 0.1.5 Index]