search for: vecaa

...e(x=dafSamp[,2], by=list(dafSamp[,1]), FUN='length') > Cy Group.1 x 1 1969 1 2 1972 1 3 1976 3 4 1984 2 5 1996 1 6 1999 1 I would like to create a new vector with the adjusted values (dafSmap[,2] * Ay(for a relevant year) / Ag) I tried to write: vecAA <- dafSamp[,2] * Ay[which(Ay[,1]==dafSamp[,1]),2] / Ag but the result is all NAs :-( Might have seen that coming, Not the same length... Question: How do I go about making such calculation? :-) Martin Hvidberg Here is the code in full, if you want to try it... dafSamp <-...