| areapl {spgam} | R Documentation |
~~ A concise (1-5 lines) description of what the function does. ~~
areapl(poly)
poly |
~~Describe poly here~~ |
~~ If necessary, more details than the description above ~~
~Describe the value returned If it is a LIST, use
comp1 |
Description of 'comp1' |
comp2 |
Description of 'comp2' |
...
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~~further notes~~
~Make other sections like Warning with section{Warning }{....} ~
~~who you are~~
~put references to the literature/web site here ~
~~objects to See Also as help, ~~~
##---- 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]]
}