Berikan indeks BENAR dari objek logis, yang memungkinkan indeks array.
which(x, arr.ind = FALSE, useNames = TRUE)
arrayInd(ind, .dim, .dimnames = NULL, useNames = FALSE)| Parameter | Deskripsi |
|---|---|
x |
a logical vector or array. NAs are allowed and omitted (treated as if FALSE). |
arr.ind |
logical; should array indices be returned when x is an array? |
ind |
integer-valued index vector, as resulting from which(x). |
.dim |
dim(.) integer vector |
.dimnames |
optional list of character dimnames(.). If useNames is true, to be used for constructing dimnames for arrayInd() (and hence, which(*, arr.ind=TRUE)). If names(.dimnames) is not empty, these are used as column names. .dimnames[[1]] is used as row names. |
useNames |
logical indicating if the value of arrayInd() should have (non-null) dimnames at all. |
# NOT RUN {
which(LETTERS == "R")
which(ll <- c(TRUE, FALSE, TRUE, NA, FALSE, FALSE, TRUE)) #> 1 3 7
names(ll) <- letters[seq(ll)]
which(ll)
which((1:12)%%2 == 0) # which are even?
which(1:10 > 3, arr.ind = TRUE)
( m <- matrix(1:12, 3, 4) )
div.3 <- m %% 3 == 0
which(div.3)
which(div.3, arr.ind = TRUE)
rownames(m) <- paste("Case", 1:3, sep = "_")
which(m %% 5 == 0, arr.ind = TRUE)
dim(m) <- c(2, 2, 3); m
which(div.3, arr.ind = FALSE)
which(div.3, arr.ind = TRUE)
vm <- c(m)
dim(vm) <- length(vm) #-- funny thing with length(dim(...)) == 1
which(div.3, arr.ind = TRUE)
# }
# NOT RUN {
<!-- %dont -->
# }