On 21/03/2016 7:53 AM, Sunny Singha wrote:
Please guide, I'm exporting data in '.csv' format in the Windows user directory, I have full access to. The write operation happens within a for loop.Each iteration exports data in csv format in the user directory. The issue is that the data gets exported for all the 9 iterations but fails for 10th iteration giving below error message. Error in file(file, ifelse(append, "a", "w")) : cannot open the connection In addition: Warning message: In file(file, ifelse(append, "a", "w")) : cannot open file './/posts_H<U+1ED9>i nh<U+1EEF>ng ngu<U+1EDD>i d<U+1ED3>ng hành cùng line_752518568125567.csv': Invalid argument Called from: file(file, ifelse(append, "a", "w")) The export directory path is current directory with 'name' extracted as below: my.file1: .//likes_H<U+1ED9>i nh<U+1EEF>ng ngu<U+1EDD>i d<U+1ED3>ng hành cùng line_752518568125567.csv my.file2: .//posts_H<U+1ED9>i nh<U+1EEF>ng ngu<U+1EDD>i d<U+1ED3>ng hành cùng line_752518568125567.csv I wondering if the error is due to the the complicated filename ? Below is the line of code I have used within loop to export data. my.file1 <- file.path('./', paste0('likes','_',name,'_',grp_id,'.csv')) my.file2 <- file.path('./', paste0('posts','_',name,'_',grp_id,'.csv')) write.csv(posts_frame, file=my.file2, row.names = F) write.csv(likes_frame, file = my.file1, row.names = F)
The <U+1ED9> and similar strings represent Unicode characters. I would guess that they are being translated to the <U+1ED9> format before being used as a filename, and the < and > symbols are not allowed in filenames in Windows.
This is a limitation of the way R handles non-ASCII characters in Windows, and there's not much you can do about it other than avoiding characters which do not display in Latin1 (or whatever R sees as your native character set).
Duncan Murdoch ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
