AQuadtree: joinAQuadtrees – R documentation

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joinAQuadtrees

Join two AQuadtree objects from the same area, to compare their data

Description

Given two objects of class AQuadtree for the same area, wich, for instance, may contain data from two different periods, joinAQuadtrees returns a new object of class AQuadtree with the common zones at the lowest shared level, summarising the data from both AQuadtrees.

Usage

joinAQuadtrees(qt1, qt2, withResiduals = FALSE, mean.1 = NULL, mean.2 = NULL)

Arguments

`qt1`	object of class "AQuadtree" containing the first object to join.
`qt2`	object of class "AQuadtree" containing the second object to join.
`withResiduals`	logical indicating if `residual` cells should be maintained (TRUE) or not (FALSE, default).
`mean.1`	character or character vector specifying the columns in the first AQuadtreeto which a weighted mean should be computed. By default the aggregation function used is `sum`.
`mean.2`	character or character vector specifying the columns in the first AQuadtreeto which a weighted mean should be computed. By default the aggregation function used is `sum`.

Details

The function joinAQuadtrees creates a new AQuadtree object from two given AQuadtree objects with data from the same area. The data of the two given objects is summarised at the smallest possible cells shared by both given objects. All the input data is maintained on the new created object. This function can be used to join the different attributes from the same area or information from different periods.

Value

AQuadtree with the information of the two given objects summarised at the lowest level shared by both objects.

Examples

data("CharlestonPop")
CharlestonPop.AQT_1<-AQuadtree(CharlestonPop, layers = 2)
CharlestonPop.AQT_2<-AQuadtree(CharlestonPop, colnames="sex",
       thresholdField=c("sex.male", "sex.female"), layers = 2)
CharlestonPop.AQT_1_2<-joinAQuadtrees(CharlestonPop.AQT_1, CharlestonPop.AQT_2)

## Not run: 
## non AQuadtree objects
joinAQuadtrees(CharlestonPop, CharlestonCensusTracts)

## End(Not run)

AQuadtree

Confidentiality of Spatial Point Data

v1.0.2

MIT + file LICENSE

Authors

Raymond Lagonigro [aut, cre] (<https://orcid.org/0000-0002-8091-4296>), Ramon Oller [aut] (<https://orcid.org/0000-0002-4333-0021>), Joan Carles Martori [aut] (<https://orcid.org/0000-0002-8400-5487>)

Initial release

2020-09-07