| Title: | Sample Dataframes by a Group |
| Version: | 1.0.0 |
| Description: | Sample dataframes by group, in the form of a 'block bootstrap'. Entire groups are returned allowing for a single 'observation' to span multiple rows of the dataframe. |
| License: | MIT + file LICENSE |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.3.2 |
| Depends: | R (≥ 4.1.0) |
| Suggests: | HospitalNetwork, knitr, rmarkdown, testthat (≥ 3.0.0) |
| Config/testthat/edition: | 3 |
| Imports: | dplyr, cli, rlang, vctrs |
| VignetteBuilder: | knitr |
| URL: | https://numbats.github.io/blockstrap/, https://github.com/numbats/blockstrap |
| BugReports: | https://github.com/numbats/blockstrap/issues |
| NeedsCompilation: | no |
| Packaged: | 2026-01-28 03:08:13 UTC; mlyd0001 |
| Author: | Michael Lydeamore 
[aut, cre, cph],
Cash Looi [aut],
Kenyon Ng [aut],
Mitchell O'Hara-Wild
[aut] |
| Maintainer: | Michael Lydeamore <michael.lydeamore@monash.edu> |
| Repository: | CRAN |
| Date/Publication: | 2026-02-01 07:20:02 UTC |
Sample complete groups from a data frame
Description
Samples complete groups from a grouped data frame, including all of each group as part of the sample. Can be considered a form of grouped bootstrap sampling.
Usage
slice_block(.data, ...)
## S3 method for class 'data.frame'
slice_block(.data, ...)
## S3 method for class 'grouped_df'
slice_block(.data, n = 1, replace = FALSE, weight_by = NULL, ...)
Arguments
.data |
A grouped data frame, generated using |
... |
Additional arguments passed to methods |
n |
Number of samples to draw |
replace |
Should sampling be done with replacement? |
weight_by |
Optional expression to weight groups by (unquoted name) |
Value
A data frame with sampled complete groups
Examples
ToothGrowth |>
dplyr::group_by(supp, dose) |>
slice_block(n = 2)