rowwise

0th

Percentile

Group input by rows

rowwise is used for the results of do when you create list-variables. It is also useful to support arbitrary complex operations that need to be applied to each row.

Usage
rowwise(data)
Arguments
data

Input data frame.

Details

Currently rowwise grouping only works with data frames. Its main impact is to allow you to work with list-variables in summarise and mutate without having to use [[1]]. This makes summarise() on a rowwise tbl effectively equivalent to plyr's ldply.

Aliases
  • rowwise
Examples
library(dplyr) df <- expand.grid(x = 1:3, y = 3:1) df %>% rowwise() %>% do(i = seq(.$x, .$y)) .Last.value %>% summarise(n = length(i))
Documentation reproduced from package dplyr, version 0.5.0, License: MIT + file LICENSE

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