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Type: Package
Title: Converts Tabular Data to Interleaved Vectors
Version: 0.1.2
Date: 2024-01-18
Description: Converts matrices and lists of matrices into a single vector by interleaving their values. That is, each element of the result vector is filled from the input matrices one row at a time. This is the same as transposing a matrix, then removing the dimension attribute, but is designed to operate on matrices in nested list structures.
License: MIT + file LICENSE
Encoding: UTF-8
RoxygenNote: 7.2.3
Depends: R (≥ 3.0.2)
LinkingTo: geometries (≥ 0.2.4), Rcpp
Imports: Rcpp
Suggests: covr, sfheaders, tinytest
NeedsCompilation: yes
Packaged: 2024-01-17 23:38:07 UTC; dave
Author: David Cooley [aut, cre], Mapbox [cph] (author of header library earcut.hpp)
Maintainer: David Cooley <david.cooley.au@gmail.com>
Repository: CRAN
Date/Publication: 2024-01-17 23:50:02 UTC

Interleave

Description

Converts matrices and lists of matrices into a vector. The elements of the vector are taken from the matrices one row at a time.

Usage

interleave(x)

Arguments

x

object to interleave

Value

vector of interleaved values

Examples


## matrix (this is equivalent to a LINESTRING in spatial structures)
m1 <- matrix(1:20, ncol = 2, byrow = TRUE )
interleave( m1 )

## This is the same as transposing and removing the 'dim' attribute
tm <- t(m1)
attr( tm, "dim" ) <- NULL
all( interleave( m1 ) == tm )

## list of matrices (this is equivalent to a POLYGON in spatial structures)
m2 <- matrix(20:1, ncol = 2, byrow = TRUE )
l <- list( m1, m2 )
interleave( l )

## nested list of matrices
l <- list( m1, list( list( m2 ) ) )
interleave( l )

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