Sorry, this sounds like a fairly basic question that can be resolved by which() and possible ifelse(). There is no details in your email.
I am afraid you have to learn the basics of R or ask question with more details (e.g. example data). Or ask someone locally. Regards, Adai Johannes Graumann wrote: > Dear All, > > I have a data frame with the columns "Mass" and "Intensity" (this is mass > spectrometry stuff). Each of the mass values gives rise to a mass window of > 5 ppm around the individual mass (from mass - mass/1E6*5 to mass + > mass/1E5*5). I need to filter the array such that in case these mass > windows overlap I retain the mass/intensity pair with the highest > intensity. > I apologize for this question, but I have no formal IT education and would > value any nudges toward favorable algorithmic solutions highly. > > Thanks for any help, > > Joh > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > > > ______________________________________________ R-help@stat.math.ethz.ch 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.