Class vector to raster — cv.2.rast • scapesClassification

Transform a class vector or a generic vector into a raster.

cv.2.rast(
  r,
  classVector,
  index = NULL,
  plot = FALSE,
  type = "classes",
  writeRaster = NULL,
  overWrite = FALSE
)

Arguments

r: raster object.
classVector: numeric vector, the values to be assigned to the cell numbers indicated by index.
index: numeric vector, the cell numbers of the argument r to which assign the values of the argument classVector. If NULL, the column Cell of the attribute table attTbl(r) is used (see attTbl).
plot: logic, plot the raster.
type: character, type of map/legend. One of "continuous", "classes", or "interval".
writeRaster: filename, if a raster name is provided save the raster to a file.
overWrite: logic, if the raster names already exist, the existing file is overwritten.

Value

A class vector or a generic vector transformed into a raster.

Details

The arguments index and vector need to have the same length. The function assign the values of vector at the positions of index to an empty raster having the same spatial properties of the raster r.

Examples

library(scapesClassification)
library(terra)

# LOAD THE DUMMY RASTER
r <- list.files(system.file("extdata", package = "scapesClassification"),
                pattern = "dummy_raster\\.tif", full.names = TRUE)
r <- terra::rast(r)

# COMPUTE THE ATTRIBUTE TABLE
at <- attTbl(r, "dummy_var")

# COMPUTE THE LIST OF NEIGBORHOODS
nbs <- ngbList(r)

# Compute an example class vector
cv <- cond.4.all(attTbl = at, cond = "dummy_var > 1", class = 1)

# Class vector to raster
cv.2.rast(r, cv, plot = TRUE)
#> class       : SpatRaster 
#> dimensions  : 7, 7, 1  (nrow, ncol, nlyr)
#> resolution  : 0.1428571, 0.1428571  (x, y)
#> extent      : 0, 1, 0, 1  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326) 
#> source      : memory 
#> name        : dummy_raster 
#> min value   :         TRUE 
#> max value   :         TRUE 
text(r) # add raster values