| Title: | Converts Tabular Data to Interleaved Vectors |
|---|---|
| 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. |
| Authors: | David Cooley [aut, cre], Mapbox [cph] (author of header library earcut.hpp) |
| Maintainer: | David Cooley <[email protected]> |
| License: | MIT + file LICENSE |
| Version: | 0.1.2 |
| Built: | 2024-12-13 06:32:04 UTC |
| Source: | CRAN |
Converts matrices and lists of matrices into a vector. The elements of the vector are taken from the matrices one row at a time.
interleave(x)interleave(x)
x |
object to interleave |
vector of interleaved values
## 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 )## 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 )