The recycling rules are documented and this is not amongst them. Computer packages do have a tendency to follow their rules rather than read your mind.
I suspect A + as.vector(a) is what you intended. On Wed, 31 Mar 2004, Tamas Papp wrote: > Hi, > > I have noticed the following: > > > a <- array(1:4, c(2, 2)) > > A <- array(1:4, c(2,2,2)) > > A + a > Error in A + a : non-conformable arrays > > It works with a matrix + a vector, why doesn't it work with arrays? > Am I missing something? > > How would you do the above operation efficiently (ie I need to add a > matrix to each "plane" of 3-dim array)? At the moment I am using > something like > > A + array(a, c(2,2,2)) > > but it doesn't seem that efficient. Why do you think is `not that efficient'? Does you have a need to save microseconds? -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
