Hi All, I have a data.frame:
>pop consumed ind recruits gonad cell 1 516.74 1 0.02 20.21 0.25 2 1143.20 1 0.02 20.21 0.50 3 250.00 1 0.02 20.21 0.25 4 251.98 1 0.02 18.69 0.25 5 598.08 1 0.02 18.69 0.25 6 437.38 1 0.02 18.69 0.25 7 250.00 1 0.02 17.39 0.25 8 250.00 1 0.02 17.39 0.25 9 250.00 1 0.02 17.39 0.25 10 257.07 1 0.02 16.02 0.25 And I need to get the number of rows that sums a particular value (e.g. 2). In my case above it would be 4 (the first 4 rows ==> sum(pop$cell)=2. Any ideas? THANKS Nico -- Nicolas L. Gutierrez School of Aquatic and Fishery Sciences 1122 NE Boat St, Seattle, WA 98105 Lab: +1 206 221 5457 Home: +1 206 290 3858 www.fish.washington.edu ______________________________________________ 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.