如何在R中不更改工作目录的情况下访问子文件夹中的指定文件?

问题描述：

在R中，我想访问子文件夹中的某些文件.但是我不想更改工作目录然后移回.它浪费了时间和时间.

In R, I want to access to some file in subfolder. But I don't want to change working directory then move back. It lost time and long.

例如，我在/home/phuong文件夹上工作. 这是phuong的树结构.

For exmaple, I working on /home/phuong folder. Here is the tree structure of phuong.

phuong-> data1, data2, data3.
data1-> abc.csv, def.csv, script1.R
data2-> bond.csv, option.csv, pricing.R
data3->.....

所以我想在abc.csv，def.csv中加载数据并在price.R中运行代码.

So i want to load data in abc.csv, def.csv and run code in pricing.R.

因此，如果使用代码setwd，它将使我浪费很多时间，并且看起来代码如此愚蠢，就像这样:

So if use code setwd, it make me lost many time and look code so stupid, like this:

setwd("/home/phuong/data1" );

read.csv("abc.csv");
read.csv("def.csv");
setwd("/home/phuong/data2" );
source("pricing.R")

我浪费了很多时间从一个文件夹移动到另一个文件夹，但是所有这些都位于同一文件夹home/phuong/中. 因此，我需要某种方法来访问子文件夹中的任何文件，而无需setwd命令. 拜托，请帮助我.

I lost a lot of times to move from folder to another folder but all of them in the same folder home/phuong/. So I need some way to access to any file in subfolder without setwd command. Please help me , thks.

答

假设您的工作目录为/home/hermie，并且您要从当前WD下方的目录(假设为/home/hermie/data)加载.csv文件，您可以简单地做到这一点:

Assuming your working directory is /home/hermie and you want to load a .csv file from a directory below your current WD (let's say /home/hermie/data), you can simply do this:

setwd('/home/hermie')
myData <- read.csv('./data/myCsvFile.csv')

当然，您也可以在目录树中向上"导航.假设您要在Bob的主目录(/home/bob)中加载文件.您可以按照以下步骤进行操作:

Of course you could also navigate "upwards" in the directory tree. Let's say you want to load a file in Bob's home directory (/home/bob). You can do it as follows:

setwd('/home/hermie')
data_from_bob <- read.csv('../bob/otherDataFile.csv') # Of course, this will work
                                                      # only if you can read
                                                      # files from that directory

希望这会有所帮助.

更新

Update

我认为您希望有人为您编写解决方案...，我建议这样做:

Somehow I think you want someone to write the solution for you... and I propose this:

> setwd('/home/phuong')
> data_abc <- read.csv('./data1/abc.csv')
> data_def <- read.csv('./data1/def.csv')
> source('./data2/pricing.R')

写这个真的难吗?如果您在此过程中的每一步都更改了WD，则您将不得不编写更多内容.

Is it really so dificult to write this? You would have to write much more if you changed your WD on every step of the way.

关于我对符号链接的建议，在您的bash终端上，您可以执行以下操作:

And, about my sugestion on symlinks, on your bash terminal you could do something like this:

$ cd /home/phuong
$ ln -s ./data1/abc.csv data1_abc.csv
$ ln -s ./data1/def.csv data1_def.csv
$ ln -s ./data2/pricing.R pricing.R

然后，从R:

> setwd('/home/phuong')
> data_abc <- read.csv('data_abc.csv')
> data_def <- read.csv('data_def.csv')
> source('pricing.R')

如何在R中不更改工作目录的情况下访问子文件夹中的指定文件?

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