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Factors to numeric

catalyze.Rd

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 SpatRaster
as.numeric(x, index=NULL, filename="", ...)

# S4 method for 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)
#> class       : SpatRaster 
#> dimensions  : 10, 10, 3  (nrow, ncol, nlyr)
#> resolution  : 36, 18  (x, y)
#> extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (CRS84) (OGC:CRS84) 
#> source(s)   : memory
#> names       : cover, letters, value 
#> min values  :     1,       1,    10 
#> max values  :     3,       3,    12 

activeCat(r) <- 3
as.numeric(r)
#> class       : SpatRaster 
#> dimensions  : 10, 10, 1  (nrow, ncol, nlyr)
#> resolution  : 36, 18  (x, y)
#> extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (CRS84) (OGC:CRS84) 
#> source(s)   : memory
#> name        : letters 
#> min value   :       1 
#> max value   :       3