If you access the help file on your computer on which you installed R then you can find the information at this link here:
http://127.0.0.1:12506/library/base/html/list.files.html
File information can be found here:
http://127.0.0.1:12506/library/base/html/file.info.html
I had a file names.csv (I had mistaken about its extension being .CSV, it was actually names.xls.csv) which I wanted to know if it exists. Then I used the following commands:
> file.exists("C:/") Does C:\ folder exists (you should not use the backward slash)?
[1] TRUE
> file.exists("C:/eula.3082") I know eula.3082 exists but... The reason is perhaps permissions
[1] FALSE
> file.exists("C:/inetpub") Does C:\inetpub exist?
[1] TRUE
> file.exists("C:/USERS") Does C:\Users exist?
[1] TRUE
> file.exists("C:/USERS/names.csv") Does C:\Users\names.csv exist?
[1] FALSE
oops!
> file.exists("C:/USERS/JFA.jpg") Does C\USERS/JFA.jpg exist?
[1] TRUE
I created a CSV file in EXCEL and made sure it was saved as a CSV by opening it in Notepad.
> file.exists("C:/USERS/mysorian/Documents/names2.csv") Does C:\USERS\names2.csv?
[1] TRUE
> file.info("C:/USERS/mysorian/Documents/names2.csv") Provide info on the file C:/USERS/mysorian/Documents/names2.csv
size isdir mode mtime ctime
C:/USERS/mysorian/Documents/names2.csv 98 FALSE 666 2015-09-22 16:42:20 2015-09-22 16:42:20
atime exe
C:/USERS/mysorian/Documents/names2.csv 2015-09-22 16:42:20 no
Listing files in a directory
Also, if you know the directory you can list all the files as in the following:
--------
Error: could not find function "List.files" -- R language is case sensitive
> list.files("C:/USERS/mysorian/documents") List the files in the directory in quotes
[1] "__VSDeploymentFailure__.txt"
[2] "~$ADI_gREETINGS.dotx"
[3] "~$TrustRelated.xlsx"
[4] "04092013 ConsolidatedDetails.xls"
[5] "3rd beneficiary details_sept15_2014.dotx"
[6] "4mysorian.xlsx"
[7] "Advanced SQL TOP.dot"
[8] "AdvisoryMichiko.xlsx"
[9] "AdvWksCustomer.rdl"
[10] "Allow connections to this computer.pdf"
[11] "Ameritrade2014.csv"
[12] "ApnStub.exe"
[13] "ArcGIS Explorer"
http://127.0.0.1:12506/library/base/html/list.files.html
File information can be found here:
http://127.0.0.1:12506/library/base/html/file.info.html
I had a file names.csv (I had mistaken about its extension being .CSV, it was actually names.xls.csv) which I wanted to know if it exists. Then I used the following commands:
> file.exists("C:/") Does C:\ folder exists (you should not use the backward slash)?
[1] TRUE
> file.exists("C:/eula.3082") I know eula.3082 exists but... The reason is perhaps permissions
[1] FALSE
> file.exists("C:/inetpub") Does C:\inetpub exist?
[1] TRUE
> file.exists("C:/USERS") Does C:\Users exist?
[1] TRUE
> file.exists("C:/USERS/names.csv") Does C:\Users\names.csv exist?
[1] FALSE
oops!
> file.exists("C:/USERS/JFA.jpg") Does C\USERS/JFA.jpg exist?
[1] TRUE
I created a CSV file in EXCEL and made sure it was saved as a CSV by opening it in Notepad.
> file.exists("C:/USERS/mysorian/Documents/names2.csv") Does C:\USERS\names2.csv?
[1] TRUE
> file.info("C:/USERS/mysorian/Documents/names2.csv") Provide info on the file C:/USERS/mysorian/Documents/names2.csv
size isdir mode mtime ctime
C:/USERS/mysorian/Documents/names2.csv 98 FALSE 666 2015-09-22 16:42:20 2015-09-22 16:42:20
atime exe
C:/USERS/mysorian/Documents/names2.csv 2015-09-22 16:42:20 no
Listing files in a directory
Also, if you know the directory you can list all the files as in the following:
--------
Error: could not find function "List.files" -- R language is case sensitive
> list.files("C:/USERS/mysorian/documents") List the files in the directory in quotes
[1] "__VSDeploymentFailure__.txt"
[2] "~$ADI_gREETINGS.dotx"
[3] "~$TrustRelated.xlsx"
[4] "04092013 ConsolidatedDetails.xls"
[5] "3rd beneficiary details_sept15_2014.dotx"
[6] "4mysorian.xlsx"
[7] "Advanced SQL TOP.dot"
[8] "AdvisoryMichiko.xlsx"
[9] "AdvWksCustomer.rdl"
[10] "Allow connections to this computer.pdf"
[11] "Ameritrade2014.csv"
[12] "ApnStub.exe"
[13] "ArcGIS Explorer"
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