There is section on argument matching in ?"["
On Tue, Dec 2, 2008 at 10:49 PM, John Tillinghast <[EMAIL PROTECTED]> wrote: > I've set up a simple tensor with indices 'a' and 'b'. > >> ftable(B) > b u v w x y > a > a1 0.001868954 0.403345197 0.030088185 0.137252368 0.142634612 > a2 0.396935972 0.945219795 0.068828465 0.314180585 0.446338719 > a3 0.752412200 0.748810918 0.125532631 0.471686930 0.345062348 > a4 0.191103000 0.536607533 0.257740399 0.525900194 0.976841803 > a5 0.581585362 0.679024312 0.333035405 0.460748770 0.438562927 > > Now I try two ways of taking the subtensor with index 'b'=2: > >> B[a=1:5, b=2] > [1] 0.4033452 0.9452198 0.7488109 0.5366075 0.6790243 > attr(,"class") > [1] "tensor" >> B[b=2, a=1:5] > [1] 0.39693597 0.94521979 0.06882847 0.31418058 0.44633872 > attr(,"class") > [1] "tensor" > > This does not seem consistent with the spirit of having named indices whose > order does not matter. > > Now, what I *really* want to do is take the subtensor where 'b' has the name > 'u' or 'w' (for instance)... > > Any suggestions? > > [[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. > ______________________________________________ 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.