Dear list, i try to do my first statistics with R.
Given a dataframe of three columns, where col1 is of type factor, col 2 and col3 are numeric and pairs of observations i would like to perform a paired t-test for each level of col1. I would like to avoid specifying the levels of col1 manually because it seems to me as being stupid, however, i did not figure out how to tell it R in an function. I tried with tapply, but it did not work. Thanks, Henning -- Jetzt dabei sein: http://www.shortview.de/[EMAIL PROTECTED] [[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.
