Nothing
midar<-
function (mippp, mippp.sp = NULL, mimark = NULL, namesmark = NULL,
traits = NULL, tree=NULL, r = NULL, buffer = 0, bfw = NULL, what=NULL)
{
if(!is.expression(what)& !is.function(what)) stop("'what' should be a valid R function or expression")
# TODO: include a test that the expression "what" will accept a matrix and will return a unique value
if (!is.null(namesmark))
mippp$marks <- factor((mippp$marks[namesmark][[1]]))
if (!is.null(mippp.sp) & !is.ppp(mippp.sp)) {
mippp.sp <- NULL
mimark <- mippp.sp
}
if (!is.null(mimark))
if (mimark %in% levels(mippp$marks) == FALSE) {
stop(paste(mimark, " can't be recognized as a mark\n\n\n\n have you indicated in which column of thedataframe are the species\n\n marks? (argument 'namesmark'\n\n"))
}
if (is.null(mippp.sp))
mippp.sp <- mippp[mippp$marks == mimark]
if (buffer != "adapt") {
if (is.null(bfw))
bfw <- erosion(mippp$window, buffer)
mippp.sp <- mippp.sp[inside.owin(mippp.sp, w = bfw)]
npoints <- rep(mippp.sp$n, length(r))
names(npoints) <- r
}
cosamt <- mitable(mippp.sp, mippp, r)
if (buffer == "adapt") {
bdp <- bdist.points(mippp.sp)
for (i in 1:length(r)) cosamt[[i]] <- cosamt[[i]][bdp >=
r[i], ]
npoints <- sapply(cosamt, function(x) dim(x)[1])
}
if(is.expression(what)) midar <- sapply(cosamt, function(x) eval(what))
if(is.function(what)) midar <- sapply(cosamt, what)
result <- data.frame(r = r, midar = midar)
#print(result)
result <- fv(result, argu = "r", ylab = substitute(MIDAR(r),
NULL), valu = "midar", fmla = midar ~ r, alim = c(min(r),
max(r)), labl = c("r", "%s(r)"), desc = c("radius of circle",
"%s"), fname = "MIDAR")
return(result)
}
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