R.filesets: extract.GenericDataFileSet – R documentation

Pricing

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

Get Started for Free

Documentation

R.filesets

extract.GenericDataFileSet

Extract a subset of the file set

Description

Extract a subset of the file set.

Usage

## S3 method for class 'GenericDataFileSet'
extract(this, files, ..., onMissing=c("NA", "error", "drop", "dropall"),
  onDuplicates=c("ignore", "drop", "error"))

Arguments

`files`	An `integer` or a `logical` `vector` indicating which data files to be extracted. Negative indices are excluded.
`...`	Not used.
`onMissing`	A `character` specifying the action if a requested file does not exist. If `"error"`, an error is thrown. If `"NA"`, a `GenericDataFile` referring to an `NA` pathname is used in place. If `"drop"`, the missing file is dropped. If `"dropall"`, an empty data set is return if one or more missing files are requested.

Value

Returns a GenericDataFileSet with zero of more GenericDataFile:s.

Author(s)

Henrik Bengtsson