1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
source("incl/start,load-only.R")
message("*** RNG ...")
set_random_seed(seed = NULL)
seed <- get_random_seed()
stopifnot(is.null(seed))
set_random_seed(seed = 42L)
seed <- get_random_seed()
stopifnot(identical(seed, 42L))
res <- tryCatch({
seed <- as_lecyer_cmrg_seed(seed = FALSE)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
seed <- as_lecyer_cmrg_seed(seed = 42L)
str(seed)
stopifnot(is_lecyer_cmrg_seed(seed))
set_random_seed(seed = seed)
stopifnot(identical(get_random_seed(), seed))
seed2 <- as_lecyer_cmrg_seed(seed = TRUE)
str(seed2)
stopifnot(identical(seed2, seed))
seed3 <- as_lecyer_cmrg_seed(seed = seed)
str(seed3)
stopifnot(identical(seed3, seed))
## A random seed
seed4 <- as_lecyer_cmrg_seed(seed = NA)
str(seed4)
stopifnot(is_lecyer_cmrg_seed(seed4))
message(" - make_rng_seeds ...")
seeds <- make_rng_seeds(2L, seed = NULL)
stopifnot(is.null(seeds))
seeds <- make_rng_seeds(2L, seed = FALSE)
stopifnot(is.null(seeds))
seeds <- make_rng_seeds(0L, seed = 42L)
stopifnot(length(seeds) == 0L, identical(seeds, list()))
seeds <- make_rng_seeds(2L, seed = TRUE)
stopifnot(length(seeds) == 2L, all(sapply(seeds, FUN = is_lecyer_cmrg_seed)))
seeds <- make_rng_seeds(3L, seed = 42L)
stopifnot(length(seeds) == 3L, all(sapply(seeds, FUN = is_lecyer_cmrg_seed)))
seeds <- make_rng_seeds(1L, seed = 42L)
stopifnot(length(seeds) == 1L, all(sapply(seeds, FUN = is_lecyer_cmrg_seed)))
seeds0 <- lapply(1:3, FUN = as_lecyer_cmrg_seed)
seeds <- make_rng_seeds(length(seeds0), seed = seeds0)
stopifnot(length(seeds) == length(seeds0),
all(sapply(seeds, FUN = is_lecyer_cmrg_seed)))
message(" - exceptions ...")
## Invalid L'Ecuyer seed
seed_invalid <- seed + 1L
res <- tryCatch({
seed <- as_lecyer_cmrg_seed(seed = seed_invalid)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## Invalid seed
res <- tryCatch({
seed <- as_lecyer_cmrg_seed(seed = 1:2)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## Invalid length
seeds0 <- lapply(1:2, FUN = as_lecyer_cmrg_seed)
res <- tryCatch({
seeds <- make_rng_seeds(1L, seed = seeds0)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## Seeds of different kinds
seeds0 <- lapply(1:2, FUN = as_lecyer_cmrg_seed)
seeds0[[1]] <- seeds0[[1]][-1]
res <- tryCatch({
seeds <- make_rng_seeds(2L, seed = seeds0)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## List of scalar seeds?
res <- tryCatch({
seeds <- make_rng_seeds(1L, seed = list(42L))
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## Not seeds at all?
seeds0 <- lapply(1:2, FUN = as_lecyer_cmrg_seed)
seeds0[[1]] <- letters[1:7]
res <- tryCatch({
seeds <- make_rng_seeds(2L, seed = seeds0)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
## Invalid seeds?
seeds0 <- lapply(1:2, FUN = as_lecyer_cmrg_seed)
seeds0 <- lapply(seeds0, FUN = rev)
res <- tryCatch({
seeds <- make_rng_seeds(2L, seed = seeds0)
}, error = identity)
print(res)
stopifnot(inherits(res, "error"))
message(" - replicated RNG draws")
library(future.apply)
seed_org <- next_random_seed()
set.seed(42)
## Draw two random number from 1:100 one after the other
seed_before <- get_random_seed()
kind_before <- RNGkind()
x <- sample.int(100L, size = 5L)
y <- sample.int(100L, size = 5L)
seed_after <- get_random_seed()
kind_after <- RNGkind()
print(c(x, y))
## Draw two random number from 1:100 at once
set_random_seed(seed_before)
kind_before2 <- RNGkind()
z <- sample.int(100L, size = 10L)
seed_after2 <- get_random_seed()
kind_after2 <- RNGkind()
print(z)
## The RNG state is the same after the second ...
## run as after the first, two-step, approach
stopifnot(identical(seed_after2, seed_after))
stopifnot(identical(kind_before2, kind_before))
stopifnot(identical(kind_after2, kind_after))
## .... and the exact same set of random numbers where
## drawn [only true in R (>= 4.0.0)]
if (getRversion() >= "4.0.0") {
stopifnot(identical(z, c(x, y)))
} else {
stopifnot(identical(z[seq_along(x)], x))
}
set_random_seed(seed_org)
stopifnot(identical(get_random_seed(), seed_org))
message("*** RNG ... DONE")
source("incl/end.R")
|
