Error in unique.default(x, nmax = nmax): unique() applies only to vectors #5392
Description
do.call("rbind.data.frame", lapply(base::split(x = iris, ~Species), head))
#> Sepal.Length Sepal.Width Petal.Length Petal.Width Species
#> setosa.1 5.1 3.5 1.4 0.2 setosa
#> setosa.2 4.9 3.0 1.4 0.2 setosa
#> setosa.3 4.7 3.2 1.3 0.2 setosa
#> setosa.4 4.6 3.1 1.5 0.2 setosa
#> setosa.5 5.0 3.6 1.4 0.2 setosa
#> setosa.6 5.4 3.9 1.7 0.4 setosa
#> versicolor.51 7.0 3.2 4.7 1.4 versicolor
#> versicolor.52 6.4 3.2 4.5 1.5 versicolor
#> versicolor.53 6.9 3.1 4.9 1.5 versicolor
#> versicolor.54 5.5 2.3 4.0 1.3 versicolor
#> versicolor.55 6.5 2.8 4.6 1.5 versicolor
#> versicolor.56 5.7 2.8 4.5 1.3 versicolor
#> virginica.101 6.3 3.3 6.0 2.5 virginica
#> virginica.102 5.8 2.7 5.1 1.9 virginica
#> virginica.103 7.1 3.0 5.9 2.1 virginica
#> virginica.104 6.3 2.9 5.6 1.8 virginica
#> virginica.105 6.5 3.0 5.8 2.2 virginica
#> virginica.106 7.6 3.0 6.6 2.1 virginica
library(data.table)
iris <- as.data.table(iris)
do.call("rbind.data.frame", lapply(base::split(x = iris, ~Species), head))
#> Error in unique.default(x, nmax = nmax): unique() applies only to vectors
sessionInfo()
#> R version 4.2.0 (2022-04-22)
#> Platform: x86_64-apple-darwin17.0 (64-bit)
#> Running under: macOS Big Sur/Monterey 10.16
#>
#> Matrix products: default
#> BLAS: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRblas.0.dylib
#> LAPACK: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib
#>
#> locale:
#> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#>
#> attached base packages:
#> [1] stats graphics grDevices utils datasets methods base
#>
#> other attached packages:
#> [1] data.table_1.14.2
#>
#> loaded via a namespace (and not attached):
#> [1] rstudioapi_0.13 knitr_1.39 magrittr_2.0.3 R.cache_0.15.0
#> [5] rlang_1.0.2 fastmap_1.1.0 fansi_1.0.3 stringr_1.4.0
#> [9] styler_1.7.0 highr_0.9 tools_4.2.0 xfun_0.31
#> [13] R.oo_1.24.0 utf8_1.2.2 cli_3.3.0 withr_2.5.0
#> [17] htmltools_0.5.2 ellipsis_0.3.2 yaml_2.3.5 digest_0.6.29
#> [21] tibble_3.1.7 lifecycle_1.0.1 crayon_1.5.1 purrr_0.3.4
#> [25] R.utils_2.11.0 vctrs_0.4.1 fs_1.5.2 glue_1.6.2
#> [29] evaluate_0.15 rmarkdown_2.14 reprex_2.0.1 stringi_1.7.6
#> [33] compiler_4.2.0 pillar_1.7.0 R.methodsS3_1.8.1 pkgconfig_2.0.3Created on 2022-05-24 by the reprex package (v2.0.1)