Sort a SpatRaster or SpatVector
sort.RdSort the cell values of a SpatRaster across layers. You can also compute the sorting order.
Or sort the records of SpatVector (or data.frame) by specifying the column number(s) or names(s) to sort on.
Usage
# S4 method for SpatRaster
sort(x, decreasing=FALSE, order=FALSE, filename="", ...)
# S4 method for SpatVector
sort(x, v, decreasing=FALSE)Arguments
- x
SpatRaster
- decreasing
logical. If
TRUE, sorting is in decreasing order- order
logical. If
TRUEthe sorting order is returned instead of the sorted values- filename
character. Output filename
- ...
additional arguments for writing files as in
writeRaster- v
character or numeric indicating the column(s) to sort on
Examples
f <- system.file("ex/elev.tif", package="terra")
r <- rast(f)
r <- c(r, r/2, r*2)
sort(r)
#> class : SpatRaster
#> dimensions : 90, 95, 3 (nrow, ncol, nlyr)
#> resolution : 0.008333333, 0.008333333 (x, y)
#> extent : 5.741667, 6.533333, 49.44167, 50.19167 (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326)
#> source(s) : memory
#> varname : elev
#> names : elevation, elevation, elevation
#> min values : 70.5, 141, 282
#> max values : 273.5, 547, 1094
ord <- sort(r, order=TRUE)
# these two are the same
ord[[1]]
#> class : SpatRaster
#> dimensions : 90, 95, 1 (nrow, ncol, nlyr)
#> resolution : 0.008333333, 0.008333333 (x, y)
#> extent : 5.741667, 6.533333, 49.44167, 50.19167 (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326)
#> source(s) : memory
#> varname : elev
#> name : elevation
#> min value : 0
#> max value : 1
which.min(r)
#> class : SpatRaster
#> dimensions : 90, 95, 1 (nrow, ncol, nlyr)
#> resolution : 0.008333333, 0.008333333 (x, y)
#> extent : 5.741667, 6.533333, 49.44167, 50.19167 (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326)
#> source(s) : memory
#> name : which.min
#> min value : 2
#> max value : 2