【发布时间】:2020-04-07 09:42:54
【问题描述】:
我有大约 300-500 个 CSV 文件,开头有一些字符信息,两列作为数字数据。我想用这样的方式制作一个包含所有数值的数据框
**File1** has two-column and more than a thousand rows: an example looks like
info info
info info
info info
X Y
1 50.3
2 56.2
3 96.5
4 56.4
5 65.2
info 0
**File2**
info info
info info
info info
X Y
1 46.3
2 65.2
3 21.6
4 98.2
5 25.3
info 0
Only Y values are changing from file to file, I want to add all the files in one file with selective rows and make a data frame. Such as I want as a data frame.
X Y1 Y2
1 46.3 50.3
2 65.2 56.2
3 21.6 96.5
4 98.2 56.4
5 25.3 65.2
I tried
files <- list.files(pattern="*.csv")
l <- list()
for (i in 1:length(files)){
l[[i]] <- read.csv(files[i], skip = 3)
}
data.frame(l)
This gives me
X1 Y1 X2 Y2
1 46.3 1 50.3
2 65.2 2 56.2
3 21.6 3 96.5
4 98.2 4 56.4
5 25.3 5 65.2
info 0 info 0
我怎样才能跳过最后一行和列 X 作为第一列(因为 X 值不会改变)
【问题讨论】: