join: Finds the Value of Mapped Variables at some Specified...

In ClementCalenge/adehabitatMA: Tools to Deal with Raster Maps

Finds the Value of Mapped Variables at some Specified Locations (Spatial Join)

Description

join finds the value of a mapped variable at some specified locations.

Usage

 join(xy, x) 

Arguments

x	an object of class SpatialPixelsDataFrame
xy	an object of class SpatialPointsDataFrame

Value

If only one variable is mapped in x, a vector with length equals to the number of points in xy.

If only several variables are mapped in x, a data.frame with a number of columns equal to the number of variables in the object of class SpatialPixelsDataFrame, and with each row corresponding to the rows of xy.

Author(s)

Clement Calenge [e-mail]

See Also

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

Examples

data(lynxjura)

## show the data
image(lynxjura$map)
points(lynxjura$locs)

## join the data to the maps:
res <- join(lynxjura$locs, lynxjura$map)
head(res)

ClementCalenge/adehabitatMA documentation built on Sept. 14, 2024, 10:03 p.m.