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# Copyright 2003-6 by Luc Anselin and Roger Bivand
#
# LA 6/28/03 read.gwt
# LA 7/12/03 revised, sorted ids
# LA 9/30/03 use match to correct orders
read.gwt2nb <- function(file, region.id=NULL) {
con <- file(file, open="r") #opens the file
firstline <- unlist(strsplit(readLines(con,1)," "))
if (length(firstline) == 4L) {
n <- as.integer(firstline[2])
shpfile <- firstline[3]
ind <- firstline[4]
if (ind != deparse(substitute(region.id)))
warning(paste("region.id not named", ind))
} else if (length(firstline) == 1L) {
n <- as.integer(firstline[1])
shpfile <- as.character(NA)
ind <- as.character(NA)
warning("Old-style GWT file")
} else stop("Invalid header line format for GWT file")
close(con)
if (n < 1) stop("non-positive number of entities")
nseq <- 1:n
if (is.null(region.id)) region.id <- nseq
if (n != length(region.id))
stop("Mismatch in dimensions of GWT file and region.id")
if (length(unique(region.id)) != length(region.id))
stop("non-unique region.id given")
odij <- read.table(file, skip=1)
# convert region.id to order
regodij <- match(odij[,1], region.id)
# 7 anmolter 2018-01-26
stopifnot(!anyNA(regodij))
regddij <- match(odij[,2], region.id)
stopifnot(!anyNA(regddij))
odij <- cbind(regodij, regddij, odij[,3])
qorder <- order(odij[,1],odij[,2])
odij <- odij[qorder,]
origvec <- unique(odij[,1])
if (!all(nseq %in% origvec))
warning(paste(paste(region.id[which(!(nseq %in% origvec))],
collapse=", "), "are not origins"))
destvec <- unique(odij[,2])
if (!all(nseq %in% destvec))
warning(paste(paste(region.id[which(!(nseq %in% destvec))],
collapse=", "), "are not destinations"))
res <- vector(mode="list", length=n)
vlist <- vector(mode="list", length=n)
rle.sn <- rle(odij[,1])
cs1.sn <- cumsum(rle.sn$lengths)
cs0.sn <- c(1, cs1.sn[1:(n-1)]+1)
ii <- 1
for (i in 1:n) {
# Bug hit by Thomas Halvorsen 10/2006, was already fixed in sn2listw()
if (!is.na(rle.sn$value[ii]) && rle.sn$value[ii] == i) {
res[[i]] <- as.integer(odij[cs0.sn[ii]:cs1.sn[ii],2])
vlist[[i]] <- as.double(odij[cs0.sn[ii]:cs1.sn[ii],3])
ii <- ii+1
} else {
res[[i]] <- 0L
}
}
class(res) <- c("nb", "GWT")
attr(res, "region.id") <- region.id
attr(res, "neighbours.attrs") <- as.character(NA)
attr(res, "weights.attrs") <- as.character(NA)
attr(res, "GeoDa") <- list(dist=vlist, shpfile=shpfile, ind=ind)
attr(res, "call") <- match.call()
attr(res, "n") <- n
res <- sym.attr.nb(res)
res
}
write.sn2gwt <- function(sn, file, shpfile=NULL, ind=NULL, useInd=FALSE, legacy=FALSE) {
if(!inherits(sn, "spatial.neighbour"))
stop("not a spatial.neighbour object")
n <- attr(sn, "n")
if (n < 1) stop("non-positive number of entities")
if (is.null(shpfile)) {
tmp <- attr(sn, "GeoDa")$shpfile
if (is.null(tmp)) shpfile <- "unknown"
else shpfile <- tmp
} else {
stopifnot(is.character(shpfile))
stopifnot(length(shpfile) == 1L)
}
if (is.null(ind)) {
tmp <- attr(sn, "GeoDa")$ind
if (is.null(tmp)) ind <- "unknown"
else ind <- tmp
} else {
stopifnot(is.character(ind))
stopifnot(length(ind) == 1L)
}
if (useInd) {
rid <- attr(sn, "region.id")
sn$from <- rid[sn$from]
sn$to <- rid[sn$to]
}
con <- file(file, open="w")
if (legacy) writeLines(format(n), con)
else writeLines(paste("0", n, shpfile, ind, sep=" "), con)
write.table(as.data.frame(sn), file=con, append=TRUE,
row.names=FALSE, col.names=FALSE, quote=FALSE)
close(con)
}
write.sn2dat <- function(sn, file) {
if(!inherits(sn, "spatial.neighbour"))
stop("not a spatial.neighbour object")
write.table(data.frame(sn[order(sn[,2]), ]),
file=file, col.names=FALSE, row.names=FALSE)
}
read.dat2listw <- function(file) {
wmat <- read.table(file)
stopifnot(ncol(wmat) == 3)
stopifnot(is.numeric(wmat[,3]))
if (storage.mode(wmat[,1]) != "integer")
storage.mode(wmat[,1])<- "integer"
if (storage.mode(wmat[,2]) != "integer")
storage.mode(wmat[,2]) <- "integer"
sn <- wmat[order(wmat[,1]),]
IDS <- unique(sn[,1])
class(sn) <- c("spatial.neighbour", "data.frame")
attr(sn, "n") <- length(IDS)
attr(sn, "region.id") <- as.character(IDS)
listw <- sn2listw(sn)
listw
}
write.sn2Arc <- function(sn, file, field=NULL) {
if(!inherits(sn, "spatial.neighbour"))
stop("not a spatial.neighbour object")
if (is.null(field)) stop("field must be given")
n <- attr(sn, "n")
if (n < 1) stop("non-positive number of entities")
nms <- as.character(attr(sn, "region.id"))
sn[,1] <- nms[sn[,1]]
sn[,2] <- nms[sn[,2]]
con <- file(file, open="w")
writeLines(field, con)
write.table(as.data.frame(sn), file=con, append=TRUE,
row.names=FALSE, col.names=FALSE, quote=FALSE)
close(con)
}
# Copyright 2011 Virgilio Gomez-Rubio
# a function to export from nb object to a particular file format
# which is used by INLA when fitting spatial models for lattice data
# revision Marcos Prates 2011-10-07
nb2INLA <-function(file, nb)
{
n<-length(nb)
if(!file.create(file))
{
stop("Cannot open file")
}
txt<-paste(n, "\n", sep="")
cat(txt, file=file, append = TRUE)
crd <- card(nb)
for(i in 1:length(nb))
{
if (crd[i] == 0) txt <- paste(c(i, 0), collapse=" ")
# Marcos Prates 2011-10-07 no-neighbour case
else txt<-paste(c(i, length(nb[[i]]), nb[[i]]), collapse=" ")
txt<-paste(txt, "\n",sep="")
cat(txt, file=file, append = TRUE)
}
}
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