fixdiag: Test for fixed diagonal

In ff: Memory-Efficient Storage of Large Data on Disk and Fast Access Functions

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)))

ff documentation built on Sept. 30, 2024, 9:38 a.m.