read.table() 和 read.csv 在 Rmd 中都有错误

Question

I want to read a txt in Rmd

---
title: "Untitled"
output: html_document
---
```{r}
country <- read.table("country.txt")
country
```

It show error:

processing file: Preview-2878539db5c7.Rmd

Quitting from lines 6-8 (Preview-2878539db5c7.Rmd) 
Error in file(file, "rt") : cannot open the connection
Calls: <Anonymous> ... withCallingHandlers -> withVisible -> eval -> eval -> read.table -  > file
Execution halted

But I can run code in R console successfully

> country <- read.table("country.txt")

> country
     production1 education1     fir1 inflation1 lq1 nonstatein1 patent1     tax1   trade1
2001    52920.47   132649.4 2.339263   0.700000  NA    19562.16  109313 23783.07 23783.07
2002    65876.57   144090.3 2.500826  -0.800000  NA    24727.30  131972 27479.61 27479.61
2003    89227.20   156280.4 2.691411   1.168900  NA    34044.45  164611 31537.50 31537.50
2004    92656.06   167683.7 2.615238   3.878600  NA    45613.10  177364 36179.87 36179.87
2005   167115.37   171379.7 2.617289   1.810000  NA    77525.52  231570 42008.37 42008.37
2006   218827.79   181084.6 2.578939   1.467800  NA    77441.52  282315 54866.43 54866.43
2007   286691.88   192677.9 2.439093   4.772700  NA    99032.26  333059 66453.31 66453.31
2008   364955.86   202542.8 2.440807   5.864570  NA   124621.23  418524 74104.80 74104.80
2009   398476.09   213539.2 3.783803  -0.693900  NA   153670.18  537957 65501.69 65501.69
2010   511364.93   254805.1 3.806066   3.322200  NA   194286.94  700304 81966.57 81966.57
2011   624657.55   279690.7 2.862413   5.393433  NA   229513.81  997132 91118.75 91118.75

The file is existing in wd

> file.exists("country.txt")
[1] TRUE

I also try to use read.csv() but it show similar error:

processing file: Preview-28786aad2e0.Rmd

Quitting from lines 6-8 (Preview-28786aad2e0.Rmd) 
Error in file(file, "rt") : cannot open the connection
Calls: <Anonymous> ... withVisible -> eval -> eval -> read.csv -> read.table -> file
Execution halted

Answer 1

The short answer is:

KNOW THY getwd()

Do not confuse the working directory of your current R console with the working directory of your R Markdown document (which is the directory of this R Markdown document). When in doubt, print out getwd() where you want to know your working directory (eg in *.Rmd). Note R Markdown documents are compiled in separate R sessions to enhance reproducibility, so you current R console has nothing to do with the compilation of the R Markdown documents.

Answer 2

您当前的 RMD 文件不在您当前的工作目录中

Answer 3

只需尝试将所有数据文件放在 Markdown (.Rmd) 文件所在的位置。

Answer 4

Mine is a silly case, but may happen to someone else... the Rmd had been saved to my default working directory not the current working directory where I thought I was. I had a long list of files and didn't realize the script was not there. Worth to check!

Answer 5

After spending literally 2 hours on this, this is the final solution-

Using getwd() will not solve your problem, you have to paste the complete path no matter what your current directory is in the R markdown

For example in my case - System - MacOS, Latest version of R and RStudio as of June 2022

Location of my file was -

/Users/bhavykhatter/Desktop/data_project/data to use/202205-divvy-tripdata.csv

On using getwd() in my markdown file I get this-

So ideally this should work

But it doesn't and we get the same error as stated above

But on entering the complete path, everything works normally