lsp_add_examples: Adds spatial data of each region in an lsp or sf object

In Nowosad/lopata: Local Pattern Analysis

Adds spatial data of each region in an lsp or sf object

Description

Adds spatial data of each region in an lsp or sf object. The output is an lsp or sf object with an additional column "region". See examples.

Usage

lsp_add_examples(x, y, window = NULL)

## S3 method for class 'lsp'
lsp_add_examples(x, y, window = NULL)

## S3 method for class 'sf'
lsp_add_examples(x, y, window = NULL)

Arguments

x	Object of class lsp - usually a subset of the output of lsp_signature() or an object of class sf - usually a subset of the output of lsp_search()
y	Object of class stars, stars_proxy, or terra's SpatRaster.
window	Specifies areas for analysis. It can be either: NULL or an sf object. The sf object is only needed for adding examples of irregular regions.

Value

The input object with a new column "region". The "region" column is a list with a raster extracted for each row.

Examples

library(stars)

landcover = read_stars(system.file("raster/landcover2015s.tif", package = "motif"))

landcover_coma = lsp_signature(landcover, type = "coma", threshold = 0.9, window = 100)
selected_coma = subset(landcover_coma, id %in% c(5, 10, 15, 35))
selected_coma

selected_coma = lsp_add_examples(x = selected_coma, y = landcover)
selected_coma

plot(selected_coma$region[[1]])
plot(selected_coma$region[[4]])


# larger data example
library(stars)

landcover = read_stars(system.file("raster/landcover2015.tif", package = "motif"))

landcover_coma = lsp_signature(landcover, type = "coma", threshold = 0.9, window = 100)
selected_coma = subset(landcover_coma, id %in% c(5, 80, 1971, 2048))
selected_coma

selected_coma = lsp_add_examples(x = selected_coma, y = landcover)
selected_coma

plot(selected_coma$region[[1]])
plot(selected_coma$region[[4]])

Nowosad/lopata documentation built on Aug. 27, 2024, 6 a.m.