【发布时间】:2018-07-19 14:47:06
【问题描述】:
我正在尝试使用dplyr 和stringr 重命名我的数据框中的所有列,但它似乎没有按照我想要的方式工作。我应该如何更改以下代码以获得我想要的输出(如下代码所示)?
这是完全可重现的代码:
library(dplyr)
library(stringr)
library(tibble)
library(rlang)
# dataframe
x <-
tibble::as.tibble(cbind(
Grace_neu_wrong = c(1:4),
Grace_acc_wrong = c(1:4),
Grace_att_wrong = c(1:4),
Grace_int_wrong = c(1:4)
))
# defining custom function to rename the entire dataframe in a certain way
string_conversion <- function(df, ...) {
# preparing the dataframe
df <- dplyr::select(.data = df,
!!rlang::quo(...))
# custom function to split the name of each column in a certain way
splitfn <- function(x) {
x <- as.character(x)
split <- stringr::str_split(string = x, pattern = "_")[[1]]
paste(split[2], split[3], '_', split[1], sep = '')
}
# applying the splitfn function to each column name and outputting the data frame
df_new <- df %>%
dplyr::select_all(.funs = colnames) %>%
dplyr::mutate_all(.funs = splitfn)
return(df_new)
}
# the output I get
string_conversion(df = x, names(x))
#> # A tibble: 4 x 4
#> Grace_neu_wrong Grace_acc_wrong Grace_att_wrong Grace_int_wrong
#> <chr> <chr> <chr> <chr>
#> 1 NANA_1 NANA_1 NANA_1 NANA_1
#> 2 NANA_1 NANA_1 NANA_1 NANA_1
#> 3 NANA_1 NANA_1 NANA_1 NANA_1
#> 4 NANA_1 NANA_1 NANA_1 NANA_1
# the output I desire
tibble::as.tibble(cbind(
neuwrong_Grace = c(1:4),
accwrong_Grace = c(1:4),
attwrong_Grace = c(1:4),
intwrong_Grace = c(1:4)
))
#> # A tibble: 4 x 4
#> neuwrong_Grace accwrong_Grace attwrong_Grace intwrong_Grace
#> <int> <int> <int> <int>
#> 1 1 1 1 1
#> 2 2 2 2 2
#> 3 3 3 3 3
#> 4 4 4 4 4
由reprex package (v0.1.1.9000) 于 2018 年 2 月 8 日创建。
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