Question

我希望从网址中打开多个文件，这些文件遵循以下一致的顺序：

file001=read.table("https://...file_001.dat")
file002=read.table("https://...file_002.dat")
file003=read.table("https://...file_003.dat")

如何创建一段代码，以这样的顺序打开多个连续的Web文件？

Answer 1

df3 <- setDT(df)[, m.test := rleid(date), by = group]

   group                date m.test
1:     A 2016-10-06 11:56:00      1
2:     A 2016-10-05 11:56:00      2
3:     A 2016-10-05 11:56:00      2
4:     A 2016-10-07 11:56:00      3
5:     B 2016-10-06 11:56:00      1
6:     B 2016-10-05 11:56:00      2
7:     B 2016-10-05 11:56:00      2
8:     B 2016-10-07 11:56:00      3

将您的修改发布到问题

path="/path/to/all_webfiles"
x=list.files(path = path, pattern = ".dat")
final_pathname = paste0(path, x)

L=lapply(seq_along(final_pathname), function(i) read.table(final_pathname[i]))

此处i <- 1:10 # assuming only 10 files l <- lapply(seq_along(i), function(j) read.table(paste0("http://file00", j)))将包含每个数据框，前提是您的网络链接正确且有效！

按顺序导入多个Web文件

1 个答案: