wpZonalStatistics: wpZonalStatistics function compute zonal statistics. That is,...

In worldpopglobal/wpUtilities: Data Analysis and Modeling Package from WorldPop

Description

wpZonalStatistics function compute zonal statistics. That is, cross-tabulate the values of a Raster* object based on a "zones" RasterLayer. NA values are removed. Function uses DoParallel library to work with a big raster data

Usage

wpZonalStatistics(x, y, fun = "mean", cores = NULL, minblk = NULL,
  na.rm = TRUE, silent = TRUE)

Arguments

x	Raster* object
y	RasterLayer object with codes representing zones
fun	The function to be applied. Either as character: 'mean', 'min', 'max' and 'sum'
cores	Integer. Number of cores for parallel calculation
minblk	Integer. Minimum number of blocks
na.rm	using na.rm = TRUE for missing data
silent	If FALSE then the progress will be shown

Value

A data.frame with a value for each zone (unique value in zones)

Examples

wpZonalStatistics( x=rasterObj1, y=rasterObj2, cores=2, minblk=4  )

worldpopglobal/wpUtilities documentation built on May 29, 2019, 11:58 a.m.