删除嵌套在数据框列表中的列标题中的句点和空格

时间:2018-11-02 18:04:10

标签: r list dataframe

我有一个数据帧列表:

 mylist<-list(df1=data.frame(var1=c("a","b","c"), var.2= 
 c("a","b","c")), df2= data.frame(var1 = c("a","b","c"), 
 var..2=c("a","b","c")))

我想删除列表中每个数据框的列标题中的句点和空格。输出如下:

 mylist<-list(df1=data.frame(var1=c("a","b","c"), var2= 
 c("a","b","c")), df2= data.frame(var1= c("a","b","c"), 
 var2=c("a","b","c")))

我尝试了以下方法:

 cleandf <- lapply(ldf, function(x) x[(colnames(x) <- gsub(".", "", 
 colnames(x), fixed = TRUE))])

2 个答案:

答案 0 :(得分:2)

以基数R V

setNames

或使用lapply(mylist, function(x) setNames(x, gsub("\\.", "", names(x))))

tidyverse

输出:

library(tidyverse)

map(mylist, ~rename_all(.x, str_replace_all, "\\.", ""))

答案 1 :(得分:1)

我重命名每个数据帧中的列,然后返回数据帧。如here所述,此期间需要使用双反斜杠作为转义字符。

lapply(mylist, function(x){names(x) <- gsub("\\.", "", names(x));x})

# $`df1`
#   var1 var2
# 1    a    a
# 2    b    b
# 3    c    c
# 
# $df2
#   var1 var2
# 1    a    a
# 2    b    b
# 3    c    c