lets.addpoly: Add polygon coverage to a PresenceAbscence object
In letsR: Data Handling and Analysis in Macroecology

Description Usage Arguments Value Author(s) See Also Examples

Add polygon coverage within cells of a PresenceAbsence object.

1	lets.addpoly(x, y, z, onlyvar = FALSE)

`x`	A `PresenceAbsence` object.
`y`	Polygon of interest.
`z`	A character indicating the column name of the polygon containing the attributes to be used.
`onlyvar`	If `TRUE` only the matrix object will be returned.

The result is a presence-absence matrix of species with the polygons' attributes used added as columns at the right-end of the matrix. The Values represent the percentage of the cell covered by the polygon attribute used.

Bruno Vilela

lets.presab.birds

lets.presab

lets.addvar

## Not run: 
data(PAM)  # Phyllomedusa presence-absence matrix
require(maptools)
data(wrld_simpl)  # World map
Brazil <- wrld_simpl[wrld_simpl$NAME == "Brazil", ]  # Brazil (polygon)

# Check where is the variable name 
# (in this case it is in "NAME" which will be my z value)
names(Brazil)

PAM_pol <- lets.addpoly(PAM, Brazil, "NAME")

## End(Not run)