band {bnbc} | R Documentation

## Get Band

### Description

Get or set band from matrix.

### Usage

    band(mat, band.no)
    band(mat, band.no) <- value

### Arguments

`mat` | A matrix.
`band.no` | Integer specifying which matrix band. `band.no` = 1 retrieves the main diagonal.
`value` | A scalar or vector equal in length to the matrix band.

### Details

A matrix band is the set of elements in a matrix from a specific off-diagonal.

### Value

A matrix band in the form of a vector.

### See Also

getBandIdx

### Examples

    mat <- matrix(1:9, 3, 3)
    band(mat, band.no = 2)
    mat
    band(mat, band.no = 2) <- c(9,10)
    mat

    data(cgEx)
    tact.1 <- contacts(cgEx)[[1]]
    b2 <- band(tact.1, 2)
    band(tact.1, 2) <- b2

[Package bnbc version 1.4.0 Index]