vectorize an expression
On Wed, 2 Apr 2003 Simon.Gatehouse at csiro.au wrote:
Dear listers, I'm having a bad R day. I just can't think of the vectorized equivalent of: for (ii in 1:n) aa[ii] = bb[ii,cc[ii]]
aa <- bb[cbind(1:n, cc[1:n])]
Brian D. Ripley, ripley at stats.ox.ac.uk 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