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