kaka-he 发表于 2012-3-7 23:54
楼主你怎么解决啊,我一直都是绑定后,将其向量值转化为数据,自己也写了个小程序,不过总觉得有点麻烦。
用stringsAsFactors = F
test.csv文件
x y z
1 1.2 A first line
2 2.3 B second line
3 4.5 A third line
4 -0.4 C fourth line
> str(read.csv("test.csv", header = TRUE))
'data.frame': 4 obs. of 3 variables:
$ x: num 1.2 2.3 4.5 -0.4
$ y: Factor w/ 3 levels "A","B","C": 1 2 1 3
$ z: Factor w/ 4 levels "first line","fourth line",..: 1 3 4 2
> str(read.csv("test.csv", header = TRUE, stringsAsFactors = F))
'data.frame': 4 obs. of 3 variables:
$ x: num 1.2 2.3 4.5 -0.4
$ y: chr "A" "B" "A" "C"
$ z: chr "first line" "second line" "third line" "fourth line"