Hi, I've this dataframes:
> data1 1 2 3 4 5 6 5 0.4963017 0 0 0.2481509 1.9852069 0.4963017 10 0.0000000 0 0 0.0000000 0.6317266 0.0000000 15 0.0000000 0 0 0.0000000 0.0000000 0.0000000 20 0.0000000 0 0 3.3955301 0.0000000 0.0000000 25 0.0000000 0 0 0.0000000 0.0000000 0.0000000 30 0.0000000 0 0 0.0000000 0.0000000 0.0000000 35 0.0000000 0 0 0.0000000 0.0000000 0.0000000 > data2 1 4 5 6 5 0.00000 0.00000 0.00000 0.0000000 10 0.00000 0.00000 0.00000 0.5849502 15 0.00000 0.00000 0.00000 0.0000000 20 0.00000 0.00000 0.00000 0.0000000 25 0.00000 10.49815 0.00000 0.0000000 Can I sum the dataframe, by colnames? The sum is: 1 2 3 4 5 6 5 0.4963017 0 0 0.2481509 1.9852069 0.4963017 10 0.0000000 0 0 0.0000000 0.6317266 0.5849502 15 0.0000000 0 0 0.0000000 0.0000000 0.0000000 20 0.0000000 0 0 3.3955301 0.0000000 0.0000000 25 0.0000000 0 0 10.498150 0.0000000 0.0000000 30 0.0000000 0 0 0.0000000 0.0000000 0.0000000 35 0.0000000 0 0 0.0000000 0.0000000 0.0000000 Thanks, Alfredo ______________________________________________ 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.