randomizr

A random sampling procedure in which units are sampled as clusters and clusters are nested within strata.

```strata_and_cluster_rs(strata = NULL, clusters = NULL, prob = NULL,
n = NULL, strata_n = NULL, strata_prob = NULL, check_inputs = TRUE)```

Arguments

strata A vector of length N that indicates which stratum each unit belongs to. A vector of length N that indicates which cluster each unit belongs to. Use for a design in which either floor(N_clusters_stratum*prob) or ceiling(N_clusters_stratum*prob) clusters are sampled within each stratum. The probability of being sampled is exactly prob because with probability 1-prob, floor(N_clusters_stratum*prob) clusters will be sampled and with probability prob, ceiling(N_clusters_stratum*prob) clusters will be sampled. prob must be a real number between 0 and 1 inclusive. (optional) Use for a design in which the scalar n describes the fixed number of units to sample in each stratum. This number does not vary across strata. Use for a design in which strata_n describes the number of units to sample within each stratum. Use for a design in which strata_prob describes the probability of being sampled within each stratum. Differs from prob in that the probability of being sampled can vary across strata. logical. Defaults to TRUE.

Value

A numeric vector of length N that indicates if a unit is sampled (1) or not (0).

Examples

```clusters <- rep(letters, times = 1:26)

strata <- rep(NA, length(clusters))
strata[clusters %in% letters[1:5]] <- "stratum_1"
strata[clusters %in% letters[6:10]] <- "stratum_2"
strata[clusters %in% letters[11:15]] <- "stratum_3"
strata[clusters %in% letters[16:20]] <- "stratum_4"
strata[clusters %in% letters[21:26]] <- "stratum_5"

table(strata, clusters)#>            clusters
#> strata       a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v
#>   stratum_1  1  2  3  4  5  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
#>   stratum_2  0  0  0  0  0  6  7  8  9 10  0  0  0  0  0  0  0  0  0  0  0  0
#>   stratum_3  0  0  0  0  0  0  0  0  0  0 11 12 13 14 15  0  0  0  0  0  0  0
#>   stratum_4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 16 17 18 19 20  0  0
#>   stratum_5  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 21 22
#>            clusters
#> strata       w  x  y  z
#>   stratum_1  0  0  0  0
#>   stratum_2  0  0  0  0
#>   stratum_3  0  0  0  0
#>   stratum_4  0  0  0  0
#>   stratum_5 23 24 25 26
S <- strata_and_cluster_rs(strata = strata,
clusters = clusters)

table(S, strata)#>    strata
#> S   stratum_1 stratum_2 stratum_3 stratum_4 stratum_5
#>   0         4        21        23        55        73
#>   1        11        19        42        35        68table(S, clusters)#>    clusters
#> S    a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v  w  x  y
#>   0  1  0  3  0  0  6  7  8  0  0 11 12  0  0  0 16  0  0 19 20  0  0 23 24  0
#>   1  0  2  0  4  5  0  0  0  9 10  0  0 13 14 15  0 17 18  0  0 21 22  0  0 25
#>    clusters
#> S    z
#>   0 26
#>   1  0

S <- strata_and_cluster_rs(clusters = clusters,
strata = strata,
prob = .5)

table(S, clusters)#>    clusters
#> S    a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v  w  x  y
#>   0  0  2  0  0  5  0  7  0  9 10 11  0 13 14  0  0  0 18  0 20  0  0 23 24 25
#>   1  1  0  3  4  0  6  0  8  0  0  0 12  0  0 15 16 17  0 19  0 21 22  0  0  0
#>    clusters
#> S    z
#>   0  0
#>   1 26table(S, strata)#>    strata
#> S   stratum_1 stratum_2 stratum_3 stratum_4 stratum_5
#>   0         7        26        38        38        72
#>   1         8        14        27        52        69
S <- strata_and_cluster_rs(clusters = clusters,
strata = strata,
strata_n = c(2, 3, 2, 3, 2))

table(S, clusters)#>    clusters
#> S    a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v  w  x  y
#>   0  0  0  3  4  5  0  0  8  0 10 11  0 13 14  0  0 17  0  0 20 21  0  0 24 25
#>   1  1  2  0  0  0  6  7  0  9  0  0 12  0  0 15 16  0 18 19  0  0 22 23  0  0
#>    clusters
#> S    z
#>   0 26
#>   1  0table(S, strata)#>    strata
#> S   stratum_1 stratum_2 stratum_3 stratum_4 stratum_5
#>   0        12        18        38        37        96
#>   1         3        22        27        53        45
S <- strata_and_cluster_rs(clusters = clusters,
strata = strata,
strata_prob = c(.1, .2, .3, .4, .5))

table(S, clusters)#>    clusters
#> S    a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v  w  x  y
#>   0  1  2  3  4  5  0  7  8  9 10  0  0 13 14 15 16  0  0 19 20  0  0 23 24  0
#>   1  0  0  0  0  0  6  0  0  0  0 11 12  0  0  0  0 17 18  0  0 21 22  0  0 25
#>    clusters
#> S    z
#>   0 26
#>   1  0table(S, strata)#>    strata
#> S   stratum_1 stratum_2 stratum_3 stratum_4 stratum_5
#>   0        15        34        42        55        73
#>   1         0         6        23        35        68

```