sub-.DD: Extract parts of an object of class DD

In david-salgado/StQ: Tools to manage metadata-incorporated key-value pair datasets

Description

[ extracts parts of an object of class DD.

It is indeed the method [ for the class DD. This method returns subsets from an object of class DD specified as an input parameter. The output is an object of the same class DD as the input parameter x.

Usage

## S3 method for class 'DD'

  x[
  i,
  j,
  by,
  keyby,
  with = TRUE,
  nomatch = getOption("datatable.nomatch"),
  mult = "all",
  roll = FALSE,
  rollends = if (roll == "nearest") c(TRUE, TRUE) else if (roll >= 0) c(FALSE, TRUE)
    else c(TRUE, FALSE),
  which = FALSE,
  .SDcols,
  verbose = getOption("datatable.verbose"),
  allow.cartesian = getOption("datatable.allow.cartesian"),
  drop = NULL,
  on = NULL
]

Arguments

x	Object of class DD.
i, j, ...	indices corresponding to elements to be extracted. The indices are numeric or character vectors, missing or NULL. Numeric values are coerced to integer with as.integer (thus truncated to zero).
drop	Included by coherence.

Value

Object of class DD with the subsetted input object.

Examples

data(ExampleDD)
## Not run: 
ExampleDD[Variable == 'Turnover']

## End(Not run)

david-salgado/StQ documentation built on Aug. 12, 2021, 3:23 p.m.