R: Extract a submatrix from a matrix

submatrix {Corbi} | R Documentation

## Extract a submatrix from a matrix

### Description

Extract a specified submatrix from a sparse matrix rapidly

### Usage

    submatrix(m, rows, cols)

### Arguments

`m` | The matrix
`rows` | The integer vectors of row index(es)
`cols` | The integer vectors of column index(es)

### Details

This function implements faster submatrix extraction algorithm for the `CsparseMatrix` class in the package Matrix.

### Value

This function will return the specified submatrix as a matrix of corresponding type.

[Package Corbi version 0.6-1 Index]