[R] R: how to do this?

[Luca Braglia]

> Da: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> Per conto di Luca Braglia
> Inviato: venerdì 11 settembre 2009 10.17
> A: r-help at r-project.org
> Oggetto: [R] how to do this?


> in this case the ouput should be
> 
> 2
> 16
> 12
> 


Obviously this ....


id.match = rep(0, nrow(y))
for (indice in 1:nrow(y)) {
	id.match[indice] <- y[indice, x[indice]] } id.match


... works, but it's not that good solution (especially for big data.frame)

Thank you