Description Usage Arguments Author(s) References See Also Examples
Creates a species geographic overlap matrix from a Presence-absence matrix.
lets.overlap(pam, method = "Chesser&Zink", xy = NULL)
A presence-absence matrix (sites in rows and species in columns,
with the first two columns containing the longitudinal and latitudinal coordinates,
respectively), or an object of class
The method used to calculate the overlap matrix. "Chesser&Zink" calculates the degree of overlap as the proportion of the smaller range that overlaps within the larger range (Chesser & Zink 1994). "Proportional" calculates the proportion of a range that overlaps another range, the resultant matrix is not symmetric. "Cells" will show the number of overlapping grid cells between a pair of species' ranges (same for both species in a pair), here the resultant matrix is symmetric.
Fabricio Villalobos & Bruno Vilela
Chesser, R. Terry, and Robert M. Zink. "Modes of speciation in birds: a test of Lynch's method." Evolution (1994): 490-497.
Barraclough, Timothy G., and Alfried P. Vogler. "Detecting the geographical pattern of speciation from species-level phylogenies." The American Naturalist 155.4 (2000): 419-434.
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## Not run: data(PAM) CZ <- lets.overlap(PAM, method = "Chesser&Zink") prop <- lets.overlap(PAM, method = "Proportional") cells <- lets.overlap(PAM, method = "Cells") ## End(Not run)
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