spatialEco (version 0.1-4)

raster.entropy: Raster Entropy

Description

Calculates entropy on integer raster (i.e., 8 bit 0-255)

Usage

raster.entropy(x, d = 5, filename = FALSE, ...)

Arguments

x

object of class raster (requires integer raster)

d

Size of matrix (window)

filename

Raster file written to disk

...

Optional arguments passed to writeRaster or dataType

Value

• raster class object or specified format raster written to disk

References

Fuchs M., Hoffmann R., Schwonke F. (2008) Change Detection with GRASS GIS - Comparison of images taken by different sensor. On line at: http://geoinformatics.fsv.cvut.cz/gwiki/Change_Detection_with_GRASS_GIS_-_Comparison_of_images_taken_by_different_sensors

Examples

require(raster)
  r <- raster(ncols=100, nrows=100)
    r[] <- round(runif(ncell(r), 1,8), digits=0)

rEnt <- raster.entropy(r, d=5)
  opar <- par  
    par(mfcol=c(2,1))
      plot(r)
        plot(rEnt)
  par(opar)