Thanks a lot for your hint marco
2011/5/27 Erich Neuwirth <erich.neuwi...@univie.ac.at> > > arr<-1:72 > > dim(arr)<-c(2,4,3,3) > > apply(arr,1:2,sum) > [,1] [,2] [,3] [,4] > [1,] 297 315 333 351 > [2,] 306 324 342 360 > > apply(arr,3:4,sum) > [,1] [,2] [,3] > [1,] 36 228 420 > [2,] 100 292 484 > [3,] 164 356 548 > > > > apply(arr,1:2,sum) > will sum all elements arr(i1,i2,..) > for each single combination of the first and the second index > over all possible combinations of the third and fourth index. > > > > > On 5/27/2011 12:06 AM, marco milella wrote: > > Hi to everybody > > I have an array with dimensions 2,4,3,3. > > Wanting to sum the matrices in the first two dimensions, I'm trying to > use > > the "apply" function, but with no results. Have to say I'm quite new with > R > > syntax. > > tx in advance > > > > marco > > > > [[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. > > > > -- Dr. Marco Milella Anthropologisches Institut & Museum Universität Zürich-Irchel Winterthurerstrasse 190 8057 Zürich Schweiz e-mail: marco.mile...@aim.uzh.ch phone: +41-44-635-5428 fax: +41-44-635-6886 [[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.
