Hi, According to my understand of the description in R-intro, double quote and single quote are the same. Can somebody confirm if this is the case?
Regards, Peng ______________________________________________ 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.
