We expect posters to have made an effort to learn R and show us code that they have tried. We do not provide free software development. The "Introduction to R" tutorial that ships with the software is one place to start, but there are many good web tutorials also available. Just search.
Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Wed, Jun 21, 2017 at 11:19 AM, Ahmed Attia <ahmedati...@gmail.com> wrote: > Hi R users, > > I need your help to write a code in r that does the following > calculation from three different datasets; > > ac = 1/sum (NPP from date 1 to date 2, dataset=1) * (biomass at date 2 > -biomass at date 1, dataset = 2) + (littfall at date 2, dataset=3). > > all the dates are in yr-month-day format. Which library or function > Should I use to tell R do these calculations of these variables at > different dates. > > I appreciate your help. > > Ahmed Attia, Ph.D. > Agronomist & Soil Scientist > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
