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|
## -----------------------------------------------------------------------------
library(BiocParallel)
stopifnot(
packageVersion("BiocParallel") > "1.27.5"
)
## -----------------------------------------------------------------------------
result1 <- bplapply(1:3, runif, BPPARAM = SerialParam(RNGseed = 100))
result1
## -----------------------------------------------------------------------------
result2 <- bplapply(1:3, runif, BPPARAM = SerialParam(RNGseed = 100))
stopifnot(
identical(result1, result2)
)
result3 <- bplapply(1:3, runif, BPPARAM = SerialParam(RNGseed = 200))
result3
stopifnot(
!identical(result1, result3)
)
## -----------------------------------------------------------------------------
result4 <- bplapply(1:3, runif, BPPARAM = SnowParam(RNGseed = 100))
stopifnot(
identical(result1, result4)
)
if (!identical(.Platform$OS.type, "windows")) {
result5 <- bplapply(1:3, runif, BPPARAM = MulticoreParam(RNGseed = 100))
stopifnot(
identical(result1, result5)
)
}
## -----------------------------------------------------------------------------
result6 <- bplapply(1:3, runif, BPPARAM = SnowParam(workers = 2, RNGseed = 100))
result7 <- bplapply(1:3, runif, BPPARAM = SnowParam(workers = 3, RNGseed = 100))
result8 <- bplapply(
1:3, runif,
BPPARAM = SnowParam(workers = 2, tasks = 3, RNGseed = 100)
)
stopifnot(
identical(result1, result6),
identical(result1, result7),
identical(result1, result8)
)
## -----------------------------------------------------------------------------
ITER_FUN_FACTORY <- function() {
x <- 1:3
i <- 0L
function() {
i <<- i + 1L
if (i > length(x))
return(NULL)
x[[i]]
}
}
## ----collapse = TRUE----------------------------------------------------------
ITER <- ITER_FUN_FACTORY()
ITER()
ITER()
ITER()
ITER()
## -----------------------------------------------------------------------------
result9 <- bpiterate(
ITER_FUN_FACTORY(), runif,
BPPARAM = SerialParam(RNGseed = 100)
)
stopifnot(
identical(result1, result9)
)
## -----------------------------------------------------------------------------
FUN1 <- function(i) {
if (identical(i, 2L)) {
## error when evaluating the second element
stop("i == 2")
} else runif(i)
}
result10 <- bptry(bplapply(
1:3, FUN1,
BPPARAM = SerialParam(RNGseed = 100, stop.on.error = FALSE)
))
result10
## -----------------------------------------------------------------------------
FUN2 <- function(i) {
if (identical(i, 2L)) {
## the random number stream should be in the same state as the
## first time through the loop, and rnorm(i) should return
## same result as FUN
runif(i)
} else {
## if this branch is used, then we are incorrectly updating
## already calculated elements -- '0' in the output would
## indicate this error
0
}
}
result11 <- bplapply(
1:3, FUN2,
BPREDO = result10,
BPPARAM = SerialParam(RNGseed = 100, stop.on.error = FALSE)
)
stopifnot(
identical(result1, result11)
)
## -----------------------------------------------------------------------------
set.seed(200)
value <- runif(1)
set.seed(200)
result12 <- bplapply(1:3, runif, BPPARAM = SerialParam(RNGseed = 100))
stopifnot(
identical(result1, result12),
identical(value, runif(1))
)
## -----------------------------------------------------------------------------
set.seed(100)
value <- runif(1)
set.seed(100)
result13 <- bplapply(1:3, runif, BPPARAM = SerialParam())
stopifnot(
!identical(result1, result13),
identical(value, runif(1))
)
## -----------------------------------------------------------------------------
param <- bpstart(SerialParam(RNGseed = 100))
result16 <- bplapply(1:3, runif, BPPARAM = param)
bpstop(param)
stopifnot(
identical(result1, result16)
)
## -----------------------------------------------------------------------------
param <- bpstart(SerialParam(RNGseed = 100))
result16 <- bplapply(1:3, runif, BPPARAM = param)
result17 <- bplapply(1:3, runif, BPPARAM = param)
bpstop(param)
stopifnot(
identical(result1, result16),
!identical(result1, result17)
)
## -----------------------------------------------------------------------------
set.seed(100)
result20 <- lapply(1:3, runif)
stopifnot(
!identical(result1, result20)
)
## ----echo = FALSE-------------------------------------------------------------
sessionInfo()
|
