R: Test for fixed diagonal

fixdiag {ff} | R Documentation

## Test for fixed diagonal

### Description

Check if an object has fixed diagonal

### Usage

    fixdiag(x, ...)
    fixdiag(x, ...) <- value
    ## S3 method for class 'ff'
    fixdiag(x, ...)
    ## Default S3 method:
    fixdiag(x, ...)
    ## S3 method for class 'dist'
    fixdiag(x, ...)

### Arguments

`x` | an ff or ram object
`value` | assignement value
`...` | further arguments (not used)

### Details

ff symmetric matrices can be declared to have fixed diagonal at creation time. Compatibility function `fixdiag.default` returns NULL, `fixdiag.dist` returns 0.

### Value

NULL or the scalar representing the fixed diagonal

### Author(s)

Jens Oehlschlägel

### See Also

`fixdiag`, `ff` , `dist`

### Examples

      fixdiag(matrix(1:16, 4, 4))
      fixdiag(dist(rnorm(1:4)))

[Package ff version 2.2-13 Index]