为什么R — dplyr包返回任意行号？
[英]Why does R — dplyr package return arbitrary row numbers?
问题描述
Take the following example from CRAN'S dplyr introduction: 
从CRAN的dplyr简介中获取以下示例：
select(flights, tail_num = tailnum)
#> # A tibble: 336,776 x 1
#> tail_num
#> <chr>
#> 1 N14228
#> 2 N24211
#> 3 N619AA
#> 4 N804JB
#> ... with 336,772 more rows
Why are these row id s being returned and is there anyway to remove them? 为什么返回这些行id ，并且无论如何都将其删除？
1 个解决方案
解决方案1
2 2017-03-14 19:12:00
These id s are only lines number that are actually not stored. 这些id只是实际上未存储的行号。 They are only here for display purposes and they are not real Ids 它们仅用于显示目的，不是真正的ID
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