collapseDimension {dembase}R Documentation

Collapse one or more dimensions of a demographic array.

Description

Aggregate values along one or more dimensions of an object of class DemographicArray. The aggregated dimensions are dropped.

Usage

collapseDimension(
  object,
  dimension = NULL,
  margin = NULL,
  weights,
  na.rm = FALSE,
  ...
)

## S4 method for signature 'Pool,ANY,ANY,missing'
collapseDimension(object, dimension = NULL, margin = NULL, weights)

## S4 method for signature 'Counts,ANY,ANY,missing'
collapseDimension(
  object,
  dimension = NULL,
  margin = NULL,
  weights,
  na.rm = FALSE
)

## S4 method for signature 'Counts,ANY,ANY,Counts'
collapseDimension(
  object,
  dimension = NULL,
  margin = NULL,
  weights,
  na.rm = FALSE
)

## S4 method for signature 'Values,ANY,ANY,ANY'
collapseDimension(
  object,
  dimension = NULL,
  margin = NULL,
  weights,
  na.rm = FALSE
)

## S4 method for signature 'Values,ANY,ANY,missing'
collapseDimension(object, dimension = NULL, margin = NULL, na.rm = FALSE)

Arguments

object

An object of class DemographicArray.

dimension

Names or indices of the dimensions to be collapsed.

margin

Names or indices of the dimensions that will remain after the collapsing.

weights

Object of class Counts. weights can only be used if object has class Values. It must have at least as much detail as object.

na.rm

A logical value indicating whether NA values should be stripped before the computation proceeds.

...

Not currently used.

Details

Either dimension or margin must be supplied, but not both.

weights are required if object has class Values, and prohibited if object has class Counts.

If all dimensions are collapsed, the result is equivalent to sum(object).

As discussed in dimtypes, some dimensions come in pairs. Members of a pair have the same base name but different suffixes, e.g. "region_orig" and "region_dest". Including the base name, e.g. "region", in the dimension or margin arguments has the same effect as including both names. If only one member of a pair of dimensions is collapsed, the suffix is removed and from the name of the remaining dimension, and the dimtype is changed to "state". See below for examples.

Value

An object of the same class as object, but with fewer dimensions, or a single number.

See Also

addDimension, collapseCategories, collapseIntervals

Examples

library(demdata)
## collapse Counts object
popn <- Counts(VAPopn)
popn
collapseDimension(popn, dimension = "age")
collapseDimension(popn, dimension = c("sex", "color"))
collapseDimension(popn, margin = c("sex", "color"))

## collapse Values object, supplying weights
rate <- Values(VADeaths2)
collapseDimension(rate, dimension = "age", weights = popn)

## special treatment of origin-destination dimensions
mig <- Counts(nz.mig)
mig
collapseDimension(mig, dimension = "island")
collapseDimension(mig, margin = "island")
## note dimension name and dimtype:
collapseDimension(mig, margin = "island_orig")

## collapse all dimensions
popn <- Counts(VAPopn)
collapseDimension(popn, dimension = c("age", "sex", "residence"))
collapseDimension(popn, margin = character())
[Package dembase version 0.0.0.119 Index]