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source("incl/start,load-only.R")
message("*** whichIndex() ...")
dims <- list(
c(1),
c(1, 1),
c(2),
c(2, 1),
c(3, 4, 3)
)
for (dim in dims) {
printf("Dimensions: (%s)\n", paste(dim, collapse = ", "))
dimnames <- lapply(dim, FUN = function(n) letters[seq_len(n)])
X <- array(seq_len(prod(dim)), dim = dim, dimnames = dimnames)
print(X)
idxs <- unique(round(seq(from = 1L, to = length(X), length.out = 5)))
print(idxs)
stopifnot(all(X[idxs] == idxs))
## (a) By matrix and dimindices
I <- arrayInd(idxs, .dim = dim(X))
print(I)
idxs2 <- whichIndex(I, dim = dim(X))
print(idxs2)
stopifnot(all(idxs2 == idxs))
## (b) By matrix and dimnames
N <- array(NA_character_, dim = dim(I))
for (kk in seq_len(ncol(N))) {
N[, kk] <- dimnames[[kk]][I[, kk]]
}
print(N)
idxs3 <- whichIndex(N, dim = dim(X), dimnames = dimnames(X))
print(idxs3)
stopifnot(all(idxs3 == idxs))
## (b) By data.frame
D <- as.data.frame(I)
for (cc in seq(from = 1L, to = ncol(D))) D[[cc]] <- N[, cc]
print(D)
idxs4 <- whichIndex(D, dim = dim(X), dimnames = dimnames(X))
print(idxs4)
stopifnot(all(idxs4 == idxs))
}
## Exceptions
dim <- c(2, 3)
ndim <- length(dim)
dimnames <- lapply(dim, FUN = function(n) letters[seq_len(n)])
I <- matrix(c(1, 1, 2, 4), ncol = ndim)
res <- try(idxs <- whichIndex(I, dim = dim, dimnames = dimnames), silent = TRUE)
stopifnot(inherits(res, "try-error"))
I <- matrix(c(0, 0), ncol = ndim)
res <- try(idxs <- whichIndex(I, dim = dim, dimnames = dimnames), silent = TRUE)
stopifnot(inherits(res, "try-error"))
I <- matrix(c("a", "q"), ncol = ndim)
res <- try(idxs <- whichIndex(I, dim = dim, dimnames = dimnames), silent = TRUE)
stopifnot(inherits(res, "try-error"))
D <- data.frame(a = c(1, 1), b = c(2, 4))
res <- try(idxs <- whichIndex(D, dim = dim, dimnames = dimnames), silent = TRUE)
stopifnot(inherits(res, "try-error"))
D <- data.frame(a = c("a", "q"), b = c(1, 2))
res <- try(idxs <- whichIndex(D, dim = dim, dimnames = dimnames), silent = TRUE)
stopifnot(inherits(res, "try-error"))
message("*** whichIndex() ... DONE")
source("incl/end.R")
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