What about: bb[cbind(1:length(cc),cc)] Eric
At 17:15 2/04/2003 +1000, 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]]
Any suggestion received with embarrassment and gratitude
Simon Gatehouse
CSIRO Exploration and Mining,
Newbigin Close off Julius Ave
North Ryde, NSW
Mail: PO Box 136, North Ryde
NSW 1670, Australia
Phone: 61 (2) 9490 8677
Fax: 61 (2) 9490 8921
Mobile: 61 0407 130 635
E-mail: simon.gatehouse at csiro.au
Web Page: http://www.csiro.au/
______________________________________________ R-help at stat.math.ethz.ch mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
-------------------------------------------------- L'erreur est certes humaine, mais un vrai d?sastre n?cessite un ou deux ordinateurs. Citation anonyme -------------------------------------------------- Eric Lecoutre Informaticien/Statisticien Institut de Statistique / UCL TEL (+32)(0)10473050 lecoutre at stat.ucl.ac.be URL http://www.stat.ucl.ac.be/ISpersonnel/lecoutre --------------------------------------------------