filenames <- list.files(path = ".", pattern = NULL, all.files = FALSE, full.names = FALSE, recursive = FALSE, ignore.case = FALSE)
library(plyr)
import.list <- llply(filenames, read.csv)
combined <- do.call("rbind", import.list)
想知道哪一行数据来自哪个CSV。想要一个标有“Source”的列,它包含特定行的CSV名称。例如
> City State Market etc Source
> Burbank IL Western etc Chicago_IL
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