actually there are too many subjects. is there a way that i can make a table such that it can tell me the frequency of number of observations?
Like 3 4 5 ------------ 30 40 60 which means there are 30 subjects which each has 3 obs., 40 which each has 4 obs..... On 1/27/07, Chuck Cleland <[EMAIL PROTECTED]> wrote: > > gallon li wrote: > > i have a data set with repeated measures on same people, structure like > > below: > > > > id x1 x2 ... > > 001 10 20 ... > > 001 8 45 ... > > 001 4 2 ... > > 002 .... > > 002 ... > > 002 .... > > 002 .... > > 003 .... > > ....... > > > > what is the easist way to show how many observations for each subject > id? > > If the data are in a data frame called df, do the following: > > table(df$id) > > Also, the following is useful for seeing how many people have a > particular number of observations: > > table(table(df$id)) > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > [email protected] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html> > > and provide commented, minimal, self-contained, reproducible code. > > -- > Chuck Cleland, Ph.D. > NDRI, Inc. > 71 West 23rd Street, 8th floor > New York, NY 10010 > tel: (212) 845-4495 (Tu, Th) > tel: (732) 512-0171 (M, W, F) > fax: (917) 438-0894 > [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
