melt.audited: Transform Methods for Class Audited
In audited: Automatic Tracing and Display of Changes to Row Count

Description Usage Arguments Value Note Author(s) References See Also Examples

These methods alter the audited object and return it with an updated transaction table. They are based on the corresponding methods for class keyed, and generate ‘transform’ transactions (aggregate, melt) or 'merge' transactions (merge).

## S3 method for class 'audited'
aggregate(
	x, 
	by = x[, setdiff(key(x), across), 
	drop = FALSE], 
	FUN, 
	across = character(0), 
	...
)
## S3 method for class 'audited'
melt(
	data, 
	id.vars = key(data), 
	measure.vars, 
	variable_name = "variable", 
	na.rm = FALSE, 
	...
)
## S3 method for class 'audited'
merge(
	x, 
	y, 
	strict = TRUE, 
	...
)

`x`	audited object
`...`	passed to other methods
`by`	passed to aggregate.keyed
`FUN`	passed to aggregate.keyed
`across`	passed to aggregate.keyed
`data`	passed to melt.keyed
`id.vars`	passed to melt.keyed
`measure.vars`	passed to melt.keyed
`variable_name`	passed to melt.keyed
`na.rm`	passed to melt.keyed
`y`	right element of a join
`strict`	prevent dropping records from x

audited

merge can drop or add records, or both. It is an error if strict is TRUE and any records in x have no representation (match on common columns) in the result. I.e., merge cannot drop records without your expressed permission. Beware that due to the rules for base::merge, record counts may not be strictly additive when merging.

Tim Bergsma

http://metrumrg.googlecode.com