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group_by works with string args, but it shouldn't #410

wch opened this Issue Apr 30, 2014 · 0 comments


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wch commented Apr 30, 2014

If the grouping var is a string, it should be treated as a new column, or something like that.

These shouldn't have identical results, but they are:

g <- group_by(mtcars, cyl) %>% summarise(foo = n())
# Source: local data frame [3 x 2]
#   cyl foo
#1   4  11
#2   6   7
#3   8  14
gs <- group_by(mtcars, "cyl") %>% summarise(foo = n())
identical(g, gs)

@hadley hadley added the bug label Aug 1, 2014

@hadley hadley added this to the 0.3 milestone Aug 1, 2014

@hadley hadley self-assigned this Aug 1, 2014

@hadley hadley closed this in d98337a Aug 1, 2014

@lock lock bot locked as resolved and limited conversation to collaborators Jun 10, 2018

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