catalyze: Factors to numeric

In terra: Spatial Data Analysis

Factors to numeric

Description

Change a categorical layer into one or more numerical layers. With as.numeric you can transfer the active category values to cell values in a non-categorical SpatRaster. catalyze creates new layers for each category.

Usage

## S4 method for signature 'SpatRaster'
as.numeric(x, index=NULL, filename="", ...)

## S4 method for signature 'SpatRaster'
catalyze(x, filename="", ...)

Arguments

x	SpatRaster
index	positive integer or category indicating the category to use. If NULL the active category is used
filename	character. Output filename
...	additional arguments for writing files as in writeRaster

Value

SpatRaster

See Also

activeCat, cats

Examples

set.seed(0)
r <- rast(nrows=10, ncols=10)
values(r) <- sample(3, ncell(r), replace=TRUE) + 10
d <- data.frame(id=11:13, cover=c("forest", "water", "urban"), letters=letters[1:3], value=10:12)
levels(r) <- d
catalyze(r)

activeCat(r) <- 3
as.numeric(r)

terra documentation built on Oct. 13, 2023, 5:08 p.m.