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我有以下tibble:如何在tibble中顯示列表的元素?
data_frame(type = list(c('1','2', 'text'), c(1L ,2L), c(1.5, 2.1), c(TRUE, FALSE))) %>%
mutate(typeof=unlist(map(type, typeof)),
mode= unlist(map(type, mode)),
class= unlist(map(type, class)))
# A tibble: 4 x 4
type typeof mode class
<list> <chr> <chr> <chr>
1 <chr [3]> character character character
2 <int [2]> integer numeric integer
3 <dbl [2]> double numeric numeric
4 <lgl [2]> logical logical logical
,我想用列類型的內容添加一列,如:
# A tibble: 4 x 4
type typeof mode class vector
<list> <chr> <chr> <chr> <chr>
1 <chr [3]> character character character c('1','2', 'text')
2 <int [2]> integer numeric integer c(1L ,2L)
3 <dbl [2]> double numeric numeric c(1.5, 2.1)
4 <lgl [2]> logical logical logical c(TRUE, FALSE)
我試圖unlist(map(type, quote))
但它給:
# A tibble: 4 x 5
type typeof mode class vector
<list> <chr> <chr> <chr> <list>
1 <chr [3]> character character character <symbol>
2 <int [2]> integer numeric integer <symbol>
3 <dbl [2]> double numeric numeric <symbol>
4 <lgl [2]> logical logical logical <symbol>
甚至不知道<symbol>
是什麼...
沒有比'type'更好的存儲方式了。將它作爲代碼的字符向量存儲是一個壞主意。要查看它,只需提取它,例如'df $ type',或者使用'tidyr :: unnest'來擴展它(在這種情況下是個壞主意,因爲類型不一致)。 – alistaire
@alistaire我只是試圖打印一張表來學習這三種功能的區別 – Dambo