合并R中多个目录中的多个.txt文件 [英] Merge multiple .txt files from multiple directories in R

问题描述

合并来自不同子目录的.txt文件

Merge .txt files from different sub directories

我有一个文件夹，其中充满了过去日期的子文件夹（例如01_14），在每个日期文件夹中有11个名为01.txt，02.txt ...的文件...我如何将所有.txt文件合并到一个数据框中，其中一列的名称为该文件夹的来源，一列的名称为file

I have a folder that is filled with sub folders of past dates (01_14 for example), inside each date folder there are 11 files named 01.txt, 02.txt... How can I merge all the .txt files into one data frame, with one column with the name of the folder from where it came from and a column with the name of file from where it came from?

我的层次结构如下所示：

My hierarchy would look something like this:

\Data
     \01_14
           01.txt
           02.txt
           ...
           11.txt 
     \02_14
           01.txt
           02.txt
           ...
           11.txt 
     \03_14
           01.txt
           02.txt
           ...
           11.txt 

推荐答案

当我需要读取多个文件时，我使用读取。 stack 辅助函数，它基本上是read.table的包装器，但是它允许您还为每个文件添加额外的列。这是我可能会在您的方案中使用的方式。

When I need to read multiple files, i use a read.stack helper function which is basically a wrapper to read.table but it allows you to also add extra columns on a per-file basis. Here's how I might use it with your scenario.

dir<-"Data"

subdir<-list.dirs(dir, recursive=F)

#get dir/file names
ff<-do.call(rbind, lapply(subdir, function(x) {
    ff<-list.files(x, "\\.txt$", include.dirs = FALSE, full.names = TRUE)
    data.frame(dir=basename(x), file=basename(ff), 
        fullpath=ff, stringsAsFactors=F)
}))

#read into data.frame
read.stack(ff$fullpath, extra=list(file=ff$file, dir=ff$dir))

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