Re: [R] nested loop for

function(d) { > d <- d[order(d$dbh2), ] > d <- transform(d, BAL2 = sum(SBA2) - cumsum(SBA2), > aa = sum(SBA2)) > d > } > > HTH, > Dennis > > On Thu, Jul 21, 2011 at 4:13 AM, paloma ruiz benito > wrote: > >

[R] nested loop for

Hi everyone, I have been working some days in a nested loop in R but I can't find the solution. I have a data.frame with an unique ID for individuals and unique ID for different stands, for each indiviadual I have a dbh record and a SBA (stand basal area) field. Pma<-rep (1:40) P<-seq(1,4,