Nothing
getlen <-
function(data, coords, loc.id, direction, zero.allowed = FALSE) {
# Empirical estimation of lengths (for embeded data)
#
# data vector of data
# coords matrix of coordinates
# loc.id location Id (which_lines output)
# direction vector (or versor) of choosen direction
# zero.allowed logical, it allows zero stratum lengths
if (!is.matrix(coords)) coords <- as.matrix(coords)
storage.mode(coords) <- "double"
nc <- dim(coords)[2]
if (length(direction) != nc) stop("wrong length of direction vector")
if (!is.factor(data)) data <- as.factor(data)
nk <- nlevels(data)
n <- length(data)
if (n != dim(coords)[1]) stop("the number of data is not equal to the number of coordinates")
if (n != length(loc.id)) stop("length of \"loc.id\" must be equal to the data length")
storage.mode(loc.id) <- "integer"
ord <- order(abs(direction), decreasing = TRUE)
ord <- cbind(loc.id, coords[, ord])
ord <- lapply(apply(ord, 2, list), unlist)
ord <- do.call("order", ord)
data <- data[ord]
loc.id <- loc.id[ord]
coords <- coords[ord, ]
lens <- .C('cEmbedLen', n = as.integer(n), nc = as.integer(nc),
coords = as.double(coords), locId = as.integer(loc.id),
data = as.integer(data), cemoc = as.integer(vector("integer", n)),
maxcens = as.double(vector("numeric", n)), tlen = as.double(vector("numeric", n)),
PACKAGE = "spMC")[c(1, 6:8)]
mycenslen <- lens$maxcens[1:lens$n]
lens$maxcens <- NULL
lens$categories <- as.factor(levels(data)[lens$cemoc[1:lens$n]])
lens$length <- lens$tlen[1:lens$n]
lens$maxcens <- mycenslen
if (!zero.allowed) {
idx <- lens$length != 0
lens$categories <- lens$categories[idx]
lens$length <- lens$length[idx]
lens$maxcens <- lens$maxcens[idx]
}
# else {
# lens$length <- lens$length + lens$maxcens
# }
lens$direction <- direction
lens$zeros <- zero.allowed
lens$cemoc <- NULL
lens$tlen <- NULL
lens$n <- NULL
class(lens) <- "lengths"
return(lens)
}
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