areapl {spgam} | R Documentation |
~~ A concise (1-5 lines) description of what the function does. ~~
areapl(poly)
poly |
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~Describe the value returned If it is a LIST, use
comp1 |
Description of 'comp1' |
comp2 |
Description of 'comp2' |
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##---- Should be DIRECTLY executable !! ---- ##-- ==> Define data, use random, ##-- or do help(data=index) for the standard data sets. ## The function is currently defined as function(poly) { np <- length(poly[,1]) polyx <- c(poly[,1],poly[1,1]) polyy <- c(poly[,2],poly[1,2]) answer <- 0 alist <- .Fortran( "areapl", as.double(polyx), as.double(polyy), as.integer(np), as.double(answer), PACKAGE="spgam") alist[[4]] }