adehabitatMA (version 0.3.17)

distfacmap: Compute distances to the different levels of a factor map

Description

This function computes maps of distances to patches belonging to the different levels of a factor variable (mapped in an object of class SpatialPixelsDataFrame).

Usage

distfacmap(x, lev = NULL)

Value

An object of class SpatialPixelsDataFrame.

Arguments

x

an object of class SpatialPixelsDataFrame with one column (considered as a factor by the function)

lev

a vector of character strings giving the labels of the levels of the factor.

Author

Clement Calenge

See Also

SpatialPixelsDataFrame-class for additionnal information on objects of class SpatialPixelsDataFrame.

Examples

## Load meuse.grid data set and converts it to
## SpatialPixelsDataFrame
data(meuse.grid)
m <- SpatialPixelsDataFrame(points = meuse.grid[c("x", "y")],
                            data = meuse.grid)

## look at the soil type
image(m[,6])

## compute the distance to each soil type
sor <- distfacmap(m[,6], lev = c("type1","type2", "type3"))

## The results
sor
mimage(sor)