Error in file file rt cannot open the connection

Question

I m new to R   and after researching this error extensively  I m still not able to find a solution for it  Here s the code  I ve checked my working directory  and made sure the files are in the right directory  Appreciate it  Thanks  pollutantmean  lt - function directory  pollutant    nitrate   id  1 332                                if grep  specdata  directory    1                                     directory  lt -     specdata                             mean polldata  lt - c               specdatafiles  lt - as character list files directory               specdatapaths  lt - paste directory  specdatafiles  sep                                 for i in id                                             curr file  lt - read csv specdatapaths i   header T  sep                          head curr file                      pollutant                     remove na  lt - curr file  is na curr file   pollutant    pollutant                      mean polldata  lt - c mean polldata  remove na                                                          mean results  lt - mean mean polldata                      return round mean results  3                      The error I m getting is below   Error in file file   rt     cannot open the connection  file file   rt    read table file   file  header   header  sep   sep  quote   quote       dec   dec  fill   fill  comment char   comment char        read csv specdatapaths i   header   T  sep         pollutantmean3  specdata    sulfate   1 10   In addition  Warning message  In file file   rt       cannot open file    specdata001 csv   No such file or directory

User · Answer

I was getting the same error when trying to import 10,000 files. I tried opening a single file with Excel and Excel gave me an error message: "the file path is too long".

The file was buried in 6 nested folders, which is a problem of itself. Moving all the files to a desktop folder solved the issue without having to change any code.

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Error in file file   rt    Created a  r file and saved it in Desktop together with a sample 10000 csv file   Once trying to read it  heisenberg  lt - read csv file  sample 100000 csv     was getting the same error as you     heisenberg  lt - read csv file  sample 10000     Error in file file   rt     cannot open the connection In addition  Warning message    In file file   rt       cannot open file  sample 10000   No such file or   directory     I knew at least two ways to fix this  one using the absolute path and the other changing the working directory   Absolute path  I fixed it adding the absolute path to the file  more precisely  heisenberg  lt - read csv file  C  Users tiago Desktop sample 100000 csv     Working directory  This error shows up because RStudio has a specific working directory defined which isn t necessarily the place the  r file is at   So  to fix using this approach I ve gone to Session   Set Working Directory   Chose Directory  CTRL   Shift   H  and selected Desktop  where the  csv file was at  That way running the following command also worked  heisenberg  lt - read csv file  sample 100000 csv

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I got my R code file from a friend and was not able to run read csv command but If I copy the same command read csv   to a new R script file  it ran fine   Below command was not running in R code file shared by my friend  working directory file name etc were all correct because If I created a new R script file and ran below command  it worked              df  lt - read csv  file csv  header TRUE stringsAsFactors   FALSE strip white               TRUE sep          issue resolution  I right clicked the R code file and  unblocked the file and click save button and issue got resolved  I your R code file is in  Downloads folder in windows   then move to some other folder

User · Answer

The reason why you see this error I guess is because RStudio lost the path of your working directory    1  Go to session      2  Set working directory      3  Choose directory     --  Then you can see a window pops up   --  Choose the folder where you store your data   This is the way without any code that you change your working directory  Hope this can help you

User · Answer

Use setwd   to change to appropriate directory  Use only filename to access any file in the working directory  Navigate a folder above by using      lt filename gt

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If running on Windows try running R or R Studio as administrator to avoid Windows OS file system constraints

User · Answer

close your R studio and run it again as an administrator  That did the magic for me  Hope it works for you and anyone going through this too

User · Answer

I got this same error message and fixed it in the easiest way I could   I put my  csv file into a file folder on my desktop  opened desktop in the window next to console on RStudio  and then opened my file there  and checked the box next to my  csv file  then I used the  more  pull down menu at the top of this window to set this as my working directory   probably the easiest thing for SUPER beginners like me

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I came across a solution based on a few answers popped in the thread   windows 10  setwd  quot D  path to folder where the files are quot   directory  lt - getwd   myfile lt -  quot a file in the folder txt quot  filepath paste0 directory  quot   quot  myfile 1  sep  quot  quot   table  lt - read table table  sep    quot  t quot   header T  row names   1  dec  quot   quot

User · Answer

One better check that can be done if you get such error while accessing a file is to use the file exists  file path file name   function  This function will return TRUE if the file is existing and accessible  else False

User · Answer

Got this error and found that RStudio on my Windows machine try to use   as escape symbol  so had to replace it with    to deal with it   Try file exists function with your path  e g    file exists  D   R  path to file csv

User · Answer

I had a same issue  I removed the extension from the file name Example my file name was saved as xyz  csv  i saved it as xyz

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Set your working directory one level folder higher  For example  if it is already set as    setwd  C  Users Z Desktop Files RStudio Coursera specdata     go up one level back and set it as    setwd  C  Users Z Desktop Files RStudio Coursera     In other words  do not make  specdata  folder as your working directory

User · Answer

You need to change directory  lt -     specdata   to directory  lt -     specdata      Relative to your current working directory  you are looking for the file 001 csv  which is in your specdata directory    This question is nearly impossible to answer without any context  since you have not provided us with the structure of your working directory here  Fortunately for you  I have already taken R Programming on Coursera  so I already did this homework question

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This error also occurs when you try to use the result of getwd   directly in the path  The problem is the missingness of the     at the end  Try the following code   projectFolder  lt - paste getwd         sep         The paste   is to concatenate the forward slash at the end

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I just spent a lot of time trying to understand what was wrong on my code too     And it seems to be simple if you are using windows   When you name your file  blabla txt  then windows name it  blabla txt txt     That s the same with  CSV files so windows create a file named  001 csv csv  if you called it  001 csv   So  when you create your  csv file  just rename it  001  and open it in R using read table   absolute path of directory with required 001 csv    It works for me

User · Answer

Error in file file   rt      I just faced the same error and resolved by removing spacing in address using paste0 instead of paste   filepath paste0 directory     filename 1  sep

[r] Error in file(file, "rt") : cannot open the connection

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