keypos: Extract Positions in redundant dimension table
In bit64: A S3 Class for Vectors of 64bit Integers

Description Usage Arguments Details Value Author(s) See Also Examples

keypos returns the positions of the (fact table) elements that participate in their sorted unique subset (dimension table)

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keypos(x, ...)
## S3 method for class 'integer64'
keypos(x, method = NULL, ...)

`x`	a vector or a data frame or an array or `NULL`.
`method`	NULL for automatic method selection or a suitable low-level method, see details
`...`	ignored

NAs are sorted first in the dimension table, see ramorder.integer64.
This function automatically chooses from several low-level functions considering the size of x and the availability of a cache. Suitable methods are sortorderkey (fast ordering) and orderkey (memory saving ordering).

an integer vector of the same length as codex containing positions relativ to codesort(unique(x), na.last=FALSE)

Jens Oehlschlägel <Jens.Oehlschlaegel@truecluster.com>

unique.integer64 for the unique subset and match.integer64 for finding positions in a different vector.

x <- as.integer64(sample(c(rep(NA, 9), 1:9), 32, TRUE))
keypos(x)

stopifnot(identical(keypos(x),  match.integer64(x, sort(unique(x), na.last=FALSE))))