split_stratum {splithalfr}

Split a stratum into two parts

Description

Splits stratum into two parts. For more information about splitting options, and an extensive list of examples, see get_split_indexes_from_stratum.

Usage

split_stratum(stratum, ...)

Arguments

stratum

(data frame, tibble, list, or vector) Stratum to split; dataframes and tibbles are counted and split by row. All other data types are counted and split by element

...

Arguments passed on to get_split_indexes_from_stratum

method

(character) Splitting method. Note that first_second and odd_even splitting method will only deliver a valid split with default settings for other arguments (subsample_p = 1, split_p = 1, replace = TRUE)

replace

(logical) If FALSE, splits are constructed by sampling from stratum without replacement. If TRUE, stratum is sampled with replacement.

split_p

(numeric) Desired joint size of both parts, expressed as a proportion of the size of the subsampled stratum. If split_p is larger than 1, and careful is FALSE, then parts are automatically sampled with replacement

subsample_p

(numeric) Subsample a proportion of stratum to be used in the split.

careful

(boolean) If TRUE, stop with an error when called with arguments that may yield unexpected splits

Value

(list) List with two elements that contain each of the two parts of stratum split in two.

See Also

Other splitting functions: apply_split_indexes_to_strata(), apply_split_indexes_to_stratum(), check_strata(), get_split_indexes_from_strata(), get_split_indexes_from_stratum(), split_df(), split_strata(), stratify()

Examples

# Split stratum odd-even
ds <- data.frame(condition = rep(c("a", "b"), each = 4), score = 1 : 8)
split_stratum(ds, method = "odd_even")