r - 在 R 中，如何向列名添加一串文本？

Question

我想在我的数据框中的列名末尾添加一串文本。我该怎么做？

示例数据(我想更改列名 A、B、C、D、E 到 Atext, Btext, Ctext, Dtext, Etext):

df <- structure(list(User_ID = 1:4, A = c(0.815353067, 0.698314902, 0.774619233, 0.949620322),
                      B = c(0.684046246, 0.427028078, 0.579449798, 0.977426626),
                      C = c(0.101562005, 0.943064479, 0.19946195, 0.70068721),
                      D = c(0.525384365, 0.638082727, 0.651924335, 0.112375646), 
                      E = c(0.415664129, 0.006406548, 0.85036104, 0.510504667)),
                class = "data.frame", row.names = c(NA, -4L))

Answer 1

使用 grep 查找字母名称列，使用 paste 将字符串 text 连接到末尾:

names.change <- grep("^[A-Z]+$", names(df))
names(df)[names.change] <- paste0(names(df)[names.change], "text")
df

  User_ID     Atext     Btext     Ctext     Dtext       Etext
1       1 0.8153531 0.6840462 0.1015620 0.5253844 0.415664129
2       2 0.6983149 0.4270281 0.9430645 0.6380827 0.006406548
3       3 0.7746192 0.5794498 0.1994619 0.6519243 0.850361040
4       4 0.9496203 0.9774266 0.7006872 0.1123756 0.510504667