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In an example just added to spdep on github, issue r-spatial/spdep#68, I find that the lisa_pvalues() are not bounded by [0, 0.5] as in for example local_moran() for the same data. When I "fold back" the values > 0.5, the vector correlates well with the equivalent conditional permutation output for the local Geary measure just added to spdep. Installing spdep from github (main), the following reproduces the objects and oddness:
library(spdep)
orig <- spData::africa.rook.nb
listw <- nb2listw(orig)
x <- spData::afcon$totcon
(A <- localC(x, listw))
listw1 <- nb2listw(droplinks(sym.attr.nb(orig), 3, sym=TRUE), zero.policy=TRUE)
(A1 <- localC(x, listw1, zero.policy=FALSE))
(A2 <- localC(x, listw1, zero.policy=TRUE))
if (require(rgeoda, quietly=TRUE)) {
W <- create_weights(as.numeric(length(x)))
for (i in 1:length(listw$neighbours)) {
set_neighbors_with_weights(W, i, listw$neighbours[[i]], listw$weights[[i]])
update_weights(W)
}
set.seed(1)
B <- local_geary(W, data.frame(x))
all.equal(A, lisa_values(B))
}
set.seed(1)
C <- localC_perm(x, listw, nsim = 499, conditional=TRUE, alternative="two.sided")
plot(lisa_pvalues(B), attr(C, "pseudo-p")[,6])
cor(lisa_pvalues(B), attr(C, "pseudo-p")[,6])
cor(ifelse(lisa_pvalues(B) < 0.5, lisa_pvalues(B), 1-lisa_pvalues(B)), attr(C, "pseudo-p")[,6])
The text was updated successfully, but these errors were encountered:
In an example just added to spdep on github, issue r-spatial/spdep#68, I find that the
lisa_pvalues()
are not bounded by[0, 0.5]
as in for examplelocal_moran()
for the same data. When I "fold back" the values > 0.5, the vector correlates well with the equivalent conditional permutation output for the local Geary measure just added to spdep. Installing spdep from github (main
), the following reproduces the objects and oddness:The text was updated successfully, but these errors were encountered: