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unnest chokes on syntactically invalid variable names #190

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lukeanker opened this Issue May 22, 2016 · 1 comment

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@lukeanker

lukeanker commented May 22, 2016

unnest refuses to process data frames with syntactically invalid column names (e.g. containing spaces or beginning with numbers):

library(dplyr)
library(tidyr)
dat <- data.frame("foo bar" = I(list(1:2, 3)), check.names = F)
unnest(dat)
# Error in parse(text = x) : <text>:1:5: unexpected symbol
#1: foo bar
#         ^

unnest_(dat, names(dat))
# Error in parse(text = x) : <text>:1:5: unexpected symbol
#1: foo bar
#         ^

dat %>% rename(foobar=`foo bar`) %>% unnest
# Source: local data frame [3 x 1]
# 
#   foobar
#    (dbl)
#1      1
#2      2
#3      3

I don't know if it's a bug or if I'm using the function wrongly, but I think it worked in previous versions of tidyr. I'm packageVersion("tidyr") ‘0.4.1’ and packageVersion("dplyr") ‘0.4.3’

@hadley

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hadley commented May 22, 2016

Simpler reprex:

library(tibble)
library(tidyr)

data_frame("foo bar" = list(1:2, 3)) %>% unnest()

@hadley hadley closed this in a41e127 May 22, 2016

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