[英]renaming column names with dplyr using tidyselect functions
我正在嘗試使用dplyr::rename
和 tidyselect 幫助程序重命名幾列,以使用某些模式來執行此操作。
我怎樣才能讓它發揮作用?
library(tidyverse)
# tidy output from broom (using development version)
(df <- broom::tidy(stats::oneway.test(formula = wt ~ cyl, data = mtcars)))
#> # A tibble: 1 x 5
#> num.df den.df statistic p.value method
#> <dbl> <dbl> <dbl> <dbl> <chr>
#> 1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming equ~
# renaming
df %>%
dplyr::rename(
.data = .,
parameter1 = dplyr::matches("^num"),
parameter2 = dplyr::matches("^denom")
)
#> Error: Column positions must be scalar
由reprex 包(v0.3.0.9001) 於 2020 年 1 月 12 日創建
你的代碼對我來說很好用,但是這里有一些其他更短的方法可以幫助你,你可以嘗試;
library(tidyverse)
# tidy output from broom (using development version)
(df <- broom::tidy(stats::oneway.test(formula = wt ~ cyl, data = mtcars)))
#> # A tibble: 1 x 5
#> num.df den.df statistic p.value method
#> <dbl> <dbl> <dbl> <dbl> <chr>
#> 1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming equ~
# renaming
df %>%
rename(parameter1 = matches("^num"),
parameter2 = matches("^denom"))
# # A tibble: 1 x 5
# parameter1 parameter2 statistic p.value method
# <dbl> <dbl> <dbl> <dbl> <chr>
# 1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming..
df %>%
rename(parameter1 = contains("num"),
parameter2 = contains("denom"))
# # A tibble: 1 x 5
# parameter1 parameter2 statistic p.value method
# <dbl> <dbl> <dbl> <dbl> <chr>
# 1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming..
df %>%
rename(parameter1 = starts_with("num"),
parameter2 = starts_with("denom"))
# # A tibble: 1 x 5
# parameter1 parameter2 statistic p.value method
# <dbl> <dbl> <dbl> <dbl> <chr>
# 1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming..
我們還可以從named
向量rename
named
library(dplyr)
library(stringr)
df %>%
rename(!!!set_names(names(df)[1:2], str_c('parameter', 1:2)))
# A tibble: 1 x 5
# parameter1 parameter2 statistic p.value method
# <dbl> <dbl> <dbl> <dbl> <chr>
#1 2 19.0 20.2 0.0000196 One-way analysis of means (not assuming equal variances)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.