Consider this example
m <- tibble::as_tibble(mtcars[1,]) %>%
mutate(ls_col=list(
list(
a=c(1:10),
b=lm(cyl~gear))
)
)Where I have a nested column that has 2 elements, one of which is an object (lm in this case). When trying to unnest elements to columns (unnest_wider) or rows (unnest_longer), tidyr complains.
m %>% tidyr::unnest_wider(ls_col)
# Error: `x` must be a vector, not a `lm` object
# Call `rlang::last_error()` to see a backtrace
m %>% tidyr::unnest_longer(ls_col)
# Error: `x` must be a vector, not a `lm` object
# Call `rlang::last_error()` to see a backtrace
Strangely, we can get the correct behavior if we use plain unnest.
m %>% tidyr::unnest(ls_col)
# # A tibble: 2 x 12
# mpg cyl disp hp drat wt qsec vs am gear carb ls_col
# <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <named list>
# 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4 <int [10]>
# 2 21 6 160 110 3.9 2.62 16.5 0 1 4 4 <lm>
I am not sure if this is intended behavior and whether there are possible workarounds.
Details
```r
sessionInfo()
# R Under development (unstable) (2019-11-04 r77367)
# Platform: x86_64-pc-linux-gnu (64-bit)
# Running under: Debian GNU/Linux 10 (buster)
#
# Matrix products: default
# BLAS/LAPACK: /usr/lib/x86_64-linux-gnu/libopenblasp-r0.3.5.so
#
# locale:
# [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
# [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
# [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=C
# [7] LC_PAPER=en_US.UTF-8 LC_NAME=C
# [9] LC_ADDRESS=C LC_TELEPHONE=C
# [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
#
# attached base packages:
# [1] stats graphics grDevices utils datasets methods base
#
# other attached packages:
# [1] dplyr_0.8.3 tidyr_1.0.0
#
# loaded via a namespace (and not attached):
# [1] Rcpp_1.0.2 fansi_0.4.0 utf8_1.1.4 zeallot_0.1.0
# [5] crayon_1.3.4 assertthat_0.2.1 R6_2.4.0 lifecycle_0.1.0
# [9] backports_1.1.5 magrittr_1.5 pillar_1.4.2 cli_1.1.0
# [13] rlang_0.4.1 vctrs_0.2.0 glue_1.3.1 purrr_0.3.3
# [17] compiler_4.0.0 pkgconfig_2.0.3 tidyselect_0.2.5 tibble_2.1.3
```
Consider this example
Where I have a nested column that has 2 elements, one of which is an object (
lmin this case). When trying to unnest elements to columns (unnest_wider) or rows (unnest_longer),tidyrcomplains.Strangely, we can get the correct behavior if we use plain
unnest.I am not sure if this is intended behavior and whether there are possible workarounds.
Details
```r sessionInfo() # R Under development (unstable) (2019-11-04 r77367) # Platform: x86_64-pc-linux-gnu (64-bit) # Running under: Debian GNU/Linux 10 (buster) # # Matrix products: default # BLAS/LAPACK: /usr/lib/x86_64-linux-gnu/libopenblasp-r0.3.5.so # # locale: # [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C # [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 # [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=C # [7] LC_PAPER=en_US.UTF-8 LC_NAME=C # [9] LC_ADDRESS=C LC_TELEPHONE=C # [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C # # attached base packages: # [1] stats graphics grDevices utils datasets methods base # # other attached packages: # [1] dplyr_0.8.3 tidyr_1.0.0 # # loaded via a namespace (and not attached): # [1] Rcpp_1.0.2 fansi_0.4.0 utf8_1.1.4 zeallot_0.1.0 # [5] crayon_1.3.4 assertthat_0.2.1 R6_2.4.0 lifecycle_0.1.0 # [9] backports_1.1.5 magrittr_1.5 pillar_1.4.2 cli_1.1.0 # [13] rlang_0.4.1 vctrs_0.2.0 glue_1.3.1 purrr_0.3.3 # [17] compiler_4.0.0 pkgconfig_2.0.3 tidyselect_0.2.5 tibble_2.1.3 ```