See ?table i.e. > x sample # species 1 1 a 2 1 b 3 2 a 4 2 c 5 3 b
> table(x) species sample # a b c 1 1 1 0 2 1 0 1 3 0 1 0 Regards, Francisco Francisco J. Zagmutt [EMAIL PROTECTED] wrote: > I have a table such that: > > sample # species > 1 a > 1 b > 2 a > 2 c > 3 b > > and i would like to build a matrix with species names (i.e. a b and c) > as field names and samples (i.e. 1,2 and 3) as row names > and 1/0 as inner values > such as: > a b c > 1 1 1 0 > 2 1 0 1 > 3 0 1 0 > > I am currently using Rcmdr package for managing datasets but need a > function about.... I tried to use stack function but only with worst results > > Thanks > Duccio > > ______________________________________________ > 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 > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.