Test for fixed diagonal

Check if an object has fixed diagonal

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

Jens Oehlschlägel

See also

fixdiag, ff , dist

Examples

  fixdiag(matrix(1:16, 4, 4))
#> NULL
  fixdiag(dist(rnorm(1:4)))
#> [1] 0