假设有三组数据:
> weight = c(150, 135, 210, 140)
> height = c(65, 61, 70, 65)
> gender = c("Fe","Fe","M","Fe")
据此,我们能够得到数据框study:
> study = data.frame(weight,height,gender)> study
weight height gender
1 150 65 Fe
2 135 61 Fe
3 210 70 M
4 140 65 Fe
列名依次是weight、height、gender,行名依次是1、2、3、4。
(1)前期的修改——列
关于列名,可以在构造数据框的时候指定:
> study = data.frame(w=weight,h=height,g=gender)> study w h g
1 150 65 Fe
2 135 61 Fe
3 210 70 M
4 140 65 Fe
(2)后期的修改——列
也能够在后期更改:
> names(study) <- c("wei","hei","gen")
> study
wei hei gen
1 150 65 Fe
2 135 61 Fe
3 210 70 M
4 140 65 Fe
(3)行名的修改——
> row.names(study)<-c("Mary","Alice","Bob","Judy")
> study
wei hei gen
Mary 150 65 Fe
Alice 135 61 Fe
Bob 210 70 M
Judy 140 65 Fe
(转自http://www.codeweblog.com/r-%E5%AE%9A%E4%B9%89%E6%95%B0%E6%8D%AE%E6%A1%86%E7%9A%84%E8%A1%8C%E5%90%8D%E5%92%8C%E5%88%97%E5%90%8D/)
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