?aggregate > y year site rep rain 1 1980 1 1 2.6550866 7 1980 1 2 3.7212390 13 1980 1 3 5.7285336 4 1980 2 1 9.0820779 10 1980 2 2 2.0168193 16 1980 2 3 8.9838968 2 1981 1 1 9.4467527 8 1981 1 2 6.6079779 14 1981 1 3 6.2911404 5 1981 2 1 0.6178627 11 1981 2 2 2.0597457 17 1981 2 3 1.7655675 3 1982 1 1 6.8702285 9 1982 1 2 3.8410372 15 1982 1 3 7.6984142 6 1982 2 1 4.9769924 12 1982 2 2 7.1761851 18 1982 2 3 9.9190609 > aggregate(y, list(y$year, y$site), mean) Group.1 Group.2 year site rep rain 1 1980 1 1980 1 2 4.034953 2 1981 1 1981 1 2 7.448624 3 1982 1 1982 1 2 6.136560 4 1980 2 1980 2 2 6.694265 5 1981 2 1981 2 2 1.481059 6 1982 2 1982 2 2 7.357413 >
On 5/30/06, Milton Cezar <[EMAIL PROTECTED]> wrote: > > Hi there, > I´m a newbie in R and I´m looking for some advice how to teste Piecewise > (Broken Stick) models. > > I´have another simple question: how can I compute descriptive statistics > for data grouped for two or more variables? See below, please. > > Year Site Repetition rainfall > 1980 1 1 ... > 1980 1 2 ... > 1980 1 3 ... > 1980 2 1 ... > 1980 2 2 ... > 1980 2 3 ... > > 1990 1 1 ... > 1990 1 2 ... > 1990 1 3 ... > 1990 2 1 ... > 1990 2 2 ... > 1990 2 3 ... > > I´d like to compute the mean rainfall for each YEAR * SITE combination. > > Kind regards, > > Miltinho > > > --------------------------------- > > [[alternative HTML version deleted]] > > > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > -- Jim Holtman Cincinnati, OH +1 513 646 9390 (Cell) +1 513 247 0281 (Home) What is the problem you are trying to solve? [[alternative HTML version deleted]]
______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
