Hi, I am experiencing a long delay when using dataframes inside loops and was wordering if this is a bug or not. Example code:
> st <- rep(1,100000) > ed <- rep(2,100000) > for(i in 1:length(st)) st[i] <- ed[i] # works fine > df <- data.frame(start=st,end=ed) > for(i in 1:dim(df)[1]) df[i,1] <- df[i,2] #takes for ever R: R 2.0.0 (2004-10-04) OS: Linux, Fedora Core 2 kernel: 2.6.10-1.14_FC2 cpu: AMD Athlon XP 1600. mem: 500MB. The example above is only to illustrate the problem. I need loops to apply some functions on pairs (not necessarily successive) of rows in a dataframe. Thankful for any advices, Firas. ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
