从数据框的第一行创建数据框的标题 [英] Create header of a dataframe from the first row in the data frame

问题描述

假设我有一个数据框:

a <- data.frame(a=c("f", 2, 3), b=c("g", 3, 7), c=c("h", 2, 4))

，我想从第一行创建列名.我的猜测是:

and I would like to create column names from the first row. MY guess was:

names(a) <- a[1,]

给出:

names(a)
[1] "3" "3" "3"

我没有完全了解正在发生的事情.谁能解释和帮助我正确做事的方式?

I did not fully get what is happening. Can anyone explain and help me on how to do it the right way?

推荐答案

a的列是因子，每列具有不同的级别. R将它们转换为整数.因为，对于每一列，字母最后按字母数字顺序出现，因此为其分配了值3.

The columns of a are factors with each column having different levels. R casts them to ints. Since, for each column the letter appears last alphanumerically it gets assigned the value 3.

尝试

names(a) = as.character(unlist(a[1,]))
names(a)

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