On 31-12-2012, at 03:24, meng <laomen...@163.com> wrote: > > I type: > dat*rep(z,rach=nrow(dat)) > "rach" is "each" indeed,but I type "rach" mistakenly. > What's strange to me is :No error reply appears,but show me the result: >> dat*rep(z,rach=nrow(dat)) > x1 x2 x3 > 1 0.1 0.4 0.7 > 2 20.0 50.0 80.0 > 3 300.0 600.0 900.0 > Why does it happen,and what "rach" means?
If you read the help for rep() with for example ?rep you will see that rep() has a … argument which caters for "further arguments that are passed to or from other methods". rach is regarded as part of … and is therefore not treated as an error. You could also use ZZZ=nrow(dat). Berend ______________________________________________ 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.
