grouping_by: grouping_by tag to group and ungroup around another operation

In moodymudskipper/tags: A collection of tags built using the package 'tag'

Description

The tagged function gains a parameter .by, groups that existed before are preserved. One can group by a computed variable, it will be kept if named, dropped otherwise.

Usage

grouping_by(.by)

Arguments

.by	variables to group by, either as a character vector or a call to vars

Examples

## Not run: 
library(dplyr)
grouping_by$summarize(iris,meanSL = mean(Sepal.Length), .by="Species")
grouping_by(.by="Species")$summarize(iris,meanSL = mean(Sepal.Length))
grouping_by$summarize_all(iris, mean, .by="Species")
grouping_by$slice(iris,1, .by="Species")
# unnamed groupings are not kept
grouping_by$summarize(
  iris,meanSW = mean(Sepal.Width), .by= vars(Species, Sepal.Width > 3.2))
# named groupings are kept
grouping_by$summarize(
  iris,meanSW = mean(Sepal.Width), .by= vars(Species, long_sepal = Sepal.Width > 3.2))
  
## End(Not run)

moodymudskipper/tags documentation built on June 25, 2019, 10:54 a.m.