NycteaBubo
NycteaBubo
/ stratified.R
Last active
March 9, 2016 15:42
— forked from mrdwab/stratified.R
Stratified random sampling from a `data.frame` in R
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| stratified <- function(df, group, size, select = NULL, | |
| replace = FALSE, bothSets = FALSE) { | |
| if (is.null(select)) { | |
| df <- df | |
| } else { | |
| if (is.null(names(select))) stop("'select' must be a named list") | |
| if (!all(names(select) %in% names(df))) | |
| stop("Please verify your 'select' argument") | |
| temp <- sapply(names(select), | |
| function(x) df[[x]] %in% select[[x]]) |