distfacmap function

Compute distances to the different levels of a factor map

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

distfacmap(x, lev = NULL)

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.

Returns

An object of class SpatialPixelsDataFrame.

Author(s)

Clement Calenge clement.calenge@ofb.gouv.fr

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)