This is not really enough information to diagnose the problem. What are the missing factor levels? Were the missing levels combined with another level or do you have missing values (NA) for those observations? Do the extra factor levels include embedded commas? There are differences between read.table and read.csv in the default quote= and comment.char= arguments.
------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of SH Sent: Wednesday, August 21, 2013 9:36 AM To: r-help@r-project.org Subject: [R] data import: strange experience Dear List: I had some strange experience in importing data. I wonder if anyone of you had the same problem before and would greatly appreciate your suggestion in advance. The original data set in excel format. Here is a brief summary of the procedure I did: 1. I saved the original excel data as csv and txt formats, separately. 2. I imported two data using the following codes. There were no error messages. dftxt = read.table('df.txt',header=T, sep='\t') dfcsv = read.csv('df.csv',header=T, sep=',') 3. When I checked data with 'str', I found that factor levels of a variable were different each other. Levels of dftxt were less than those of dfcsv (48 vs 52). 4. So, I checked 'df.txt' file and found that the missing levels were still there, i.e., there is a no problem in text file. I suspect that something happened when I imported it into R. Since there was no errors in importing the file into R, I do not have an idea where to start to fix it. Do you have any suggestion? Thank you very much in advance, SH [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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. ______________________________________________ R-help@r-project.org mailing list 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.
