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dplyr::tally does not work for data.frame with no columns #3071

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JohnMount opened this issue Sep 3, 2017 · 2 comments
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dplyr::tally does not work for data.frame with no columns #3071

JohnMount opened this issue Sep 3, 2017 · 2 comments
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@JohnMount
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@JohnMount JohnMount commented Sep 3, 2017

In attempting to find a good work-around for dplyr issue 3069 I ran into this. If we form a data.frame that happens to have no columns (by dropping a column), then dplyr::tally does not return a count.

suppressPackageStartupMessages(library("dplyr"))
packageVersion("dplyr")
#> [1] '0.7.2.9000'

data.frame(n = as.raw(1:3)) %>% 
  select(-n) %>% tally
#> data frame with 0 columns and 3 rows
@krlmlr
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@krlmlr krlmlr commented Sep 15, 2017

Thanks, confirmed. Same behavior with summarise(n = n()).

krlmlr added a commit to krlmlr/dplyr that referenced this issue Dec 31, 2017
…arize-zero-columns', 'b-tidyverse#3266-join-clash' and 'b-tidyverse#3258-named' into r-0.7.5
krlmlr added a commit to krlmlr/dplyr that referenced this issue Jan 6, 2018
@krlmlr krlmlr closed this in #3274 Feb 3, 2018
krlmlr added a commit to krlmlr/dplyr that referenced this issue Mar 13, 2018
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@lock lock bot commented Aug 2, 2018

This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue. https://reprex.tidyverse.org/

@lock lock bot locked and limited conversation to collaborators Aug 2, 2018
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