This function calculates the number of times a pixel has changed during the analysed period. It returns a raster with the number of changes as pixel value and a table containing the areal percentage of every pixel value (number of changes).
acc_changes(path)
| path | The path for the Raster* directory or list of Raster* to be analysed. |
|---|
Two objects, a RasterLayer and a table.
# \donttest{ url <- "https://zenodo.org/record/3685230/files/SaoLourencoBasin.rda?download=1" temp <- tempfile() download.file(url, temp, mode = "wb") # downloading the SaoLourencoBasin dataset load(temp) # the acc_changes() function, with the SaoLourencoBasin dataset acc_changes(SaoLourencoBasin) #> [[1]] #> class : RasterLayer #> dimensions : 6372, 6546, 41711112 (nrow, ncol, ncell) #> resolution : 30, 30 (x, y) #> extent : 654007.5, 850387.5, 8099064, 8290224 (xmin, xmax, ymin, ymax) #> crs : +proj=utm +zone=21 +south +ellps=GRS80 +units=m +no_defs #> source : r_tmp_2021-11-08_025136_14583_64535.grd #> names : layer #> values : 0, 2 (min, max) #> #> #> [[2]] #> # A tibble: 3 × 3 #> PxValue Qt Percent #> <int> <int> <dbl> #> 1 0 21819779 87.6 #> 2 1 2787995 11.2 #> 3 2 301086 1.21 #> # }