Test for symmetric structure
Check if an object is inherently symmetric (its structure, not its data)
symmetric(x, ...) ## S3 method for class 'ff' symmetric(x, ...) ## Default S3 method: symmetric(x, ...) ## S3 method for class 'dist' symmetric(x, ...)
x |
an ff or ram object |
... |
further arguments (not used) |
ff matrices can be declared symmetric at creation time. Compatibility function symmetric.default returns FALSE, symmetric.dist returns TRUE.
TRUE or FALSE
Jens Oehlschlägel
symmetric, ff
, dist, isSymmetric
symmetric(matrix(1:16, 4, 4)) symmetric(dist(rnorm(1:4)))
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