PATH0: Path model in structural form

In silicate: Common Forms for Complex Hierarchical and Relational Data Structures

Path model in structural form

Description

Structural form requires only tables 'object' and 'vertex'.

Minimal columns is x,y but can be grouped by path_ for separate paths, then subobject_ and object_ for full polygon support.

Usage

PATH0(x, ...)

## Default S3 method:
PATH0(x, ...)

## S3 method for class 'PATH0'
PATH0(x, ...)

PATH0_from_df(
  x,
  ...,
  path_ = "path_",
  object_ = "object_",
  subobject_ = "subobject_",
  x_ = "x",
  y_ = "y"
)

Arguments

x	data frame with at least x, y columns
...	ignored
path_	path identifier, these should identify individual paths
object_	object identifier (like group in ggplot)
subobject_	subobject identifier (like polygon_id with multipolygons in sfheaders)
x_	optional name for x column (assumed to be x)
y_	optional name for x column (assumed to be y)

Details

This function exists as a special-case for non-format input for PATH0(). It's expected there are columns x, y, and optionally object_, subobject_, and path_. These correspond to names in sfheaders, multipolygon_id, polygon_id, and linestring_id. (subobject is optional if not multipolygon).

Value

PATH0 model with tables 'object' and 'vertex'

Examples

(p <- PATH0(minimal_mesh))

p$object$topology_
PATH0_from_df(data.frame(x = runif(10), y = runif(10)))

silicate documentation built on Jan. 7, 2023, 1:15 a.m.