Your question is a little vague. Do you just want to know how often z falls in one the three classes? If so, you could either code an indicator variable (e.g. z.cat) that expresses the three categories and then do table(z.cat). Alternatively, you could just do
sum(z>0&z<1000) sum(z>10000&z<3000) sum(z>3000) It's unclear to me whether you want to summarize the other variables (x and y) for each of the categories of z. If you want to do that, use tapply (see ?tapply). Daniel ------------------------- cuncta stricte discussurus ------------------------- -----Ursprüngliche Nachricht----- Von: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Im Auftrag von Inchallah Yarab Gesendet: Monday, August 24, 2009 11:59 AM An: r-help@r-project.org Betreff: [R] table function hi, i want to use the function table to build a table not of frequence (number of time the vareable is repeated in a list or a data frame!!) but in function of classes I don t find a clear explnation in examples of ?table !!! example x y z 1 0 100 5 1 1500 6 1 1200 2 2 500 1 1 3500 5 2 2000 8 5 4500 i want to do a table summerizing the number of variable where z is in [0-1000],],[1000-3000], [> 3000] thank you very much for your help [[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.
