r - dplyr::过滤器 "No tidyselect variables were registered"

Question

我正在尝试使用 dplyr::filter() 过滤我的 tibble 的特定行功能。

这是我的小贴士的一部分 head(raw.tb) :

A tibble: 738 x 4
      geno   ind     X     Y
     <chr> <chr> <int> <int>
 1 san1w16    A1   467   383
 2 san1w16    A1   465   378
 3 san1w16    A1   464   378
 4 san1w16    A1   464   377
 5 san1w16    A1   464   376
 6 san1w16    A1   464   375
 7 san1w16    A1   463   375
 8 san1w16    A1   463   374
 9 san1w16    A1   463   373
10 san1w16    A1   463   372
# ... with 728 more rows

当我要求时: raw.tb %>% dplyr::filter(ind == contains("A"))
我得到: Error in filter_impl(.data, quo) :
Evaluation error: No tidyselect variables were registered
在我的微博中 unique(raw.tb$ind)是:

    [1] "A1"  "A10" "A11" "A12" "A2"  "A3"  "A4"  "A5"  "A6"  "A7"  "A8"  "A9"  "B1" 
[14] "B10" "B11" "B12" "B2"  "B3"  "B4"  "B5"  "B6"  "B7"  "B8"  "B9"  "C1"  "C10"
[27] "C11" "C12" "C2"  "C3"  "C4"  "C5"  "C6"  "C7"  "C8"  "C9"  "D1"  "D10" "D11"
[40] "D12" "D2"  "D3"  "D4"  "D5"  "D6"  "D7"  "D8"  "D9"  "E1"  "E10" "E11" "E12"
[53] "E2"  "E3"  "E4"  "E5"  "E6"  "E7"  "E8"  "E9"  "F1"  "F10" "F11" "F12" "F2" 
[66] "F3"  "F4"  "F5"  "F6"  "F7"  "F8"  "F9"  "G1"  "G10" "G11" "G2"  "G3"  "G4" 
[79] "G5"  "G6"  "G7"  "G8"  "G9"  "H1"  "H10" "H11"

我只想提取 raw.tb$ind 的行使用 tidyverse 语言以“A”开头。

(我知道如何在基础 R 中做到这一点，但我的目标是使用 tidyverse)。

非常感谢您的任何反馈

Answer 1

filter需要一个逻辑向量来过滤行。 select辅助 ( ?select_helpers ) 函数 contains根据某种模式选择数据集的列。为了过滤行，我们可以使用 grepl来自 base R

raw.tb %>%
   dplyr::filter(grepl("A", ind)) 

或 str_detect来自 stringr ( tidyverse 中的软件包之一

raw.tb %>%
  dplyr::filter(stringr::str_detect(ind, "A"))