Hi: On Mon, May 23, 2011 at 7:52 AM, CAR <acas...@gmail.com> wrote: > Hi everybody!! > > I'm trying to assign boolean values to a column in a matrix depending on the > number of times present in another column. I have no clue,
Sorry, I don't have time to help. But have you read "The Introduction to R" tutorial where you might find sufficient info to help you solve problems like this? It's well written (IMHO) and not too long (also IMHO). Cheers, Bert I have been 2 > days looking for a way, if somebody knows what kind of functions I need to > use I will really apreciate it. > > example: > > Color Type Mark1 Mark2 Mark3 > Red high 139 P alpha > blue low 140 P alpha > Green high 141 S alpha > Yellow low 142 S beta > Red high 143 P gamma > > If we only take into account columns Mark1, Mark2 and Mark3. I would like to > ask R to write another column with 0=one; 1=more than one. > If alpha is present for more than one Mark 2, so P and S, then I will like > to assign value 1 if only for one then assign the value 0. > > Thanks for your help > > > -- > View this message in context: > http://r.789695.n4.nabble.com/How-do-I-assign-boolean-o-1-values-to-a-column-tp3544304p3544304.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics ______________________________________________ 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.
