I would raise x,y and z in a loop but I won't raise of 1. I tried this but it doesn't work
mydata=matrix(nrow=1500,ncol=3) i=1 for(x in 0:10){ for(y in 0:20){ for(z in 0:10){ mydata[i,]=c(x,y,z) i=i+1 z=z+2} y=y+4} x=x+2} And I would have something like that x y z 0 0 0 0 0 2 0 0 4 0 0 6 0 0 8 0 0 10 0 4 0 0 4 2 ... Could anybody help me? I don't work on a special package to do it... Thanks Cordialement Damien Landais ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.