extensions: Instantiate Records Implied By Range Data
In metrumrg: Pharmacometric Tools for Data Preparation, Modeling, Simulation, and Reporting

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

deranged generates the records implied by the range stored as start and stop.

## S3 method for class 'keyed'
deranged(x, ...)
## S3 method for class 'data.frame'
deranged(x, start, stop, result = start, dropStop = TRUE, ...)

`x`	dispatch argument
`start`	name of column with `start` values
`stop`	name of column with `stop` values
`result`	name of column in which to place the result
`dropStop`	whether to drop the `stop` column before returning
`...`	extra arguments, usually ignored; see details

deranged.data.frame. When a dataset attribute (column) is constant over some range of another discreet attribute, information may be stored more compactly by specifying the constant attribute once, together with the start and stop of the range. This function takes such a dataset and instantiates all implied records. Warning: the function calls seq(start,stop) for each row, and makes no assumptions about whether the data is ascending, descending, stationary (start==stop), or undefined (one or more of start and stop is NA). deranged.keyed is just a wrapper that preserves attributes.

deranged returns keyed data.frame.

Tim Bergsma

http://metrumrg.googlecode.com