Petr Pikal [email protected] 724008364, 581252140, 581252257
[email protected] napsal dne 16.04.2009 16:45:15: > > I have csv files imported in r each with 2 columns and many many rows. I have > sorted the data in them but want to extract some values. > > The first column is an ID > The second is a p-value ( now sorted in increasing order with NA's last) > I want to extract the rows with a p-value of less than 0.05) dd<-data.frame(runif(20), runif(20)) names(dd)<-c(letters[1:2]) dd[18:20,2]<-NA values greater than .8 with NA values > dd[dd$b>.8,] a b 2 0.8288003 0.8263982 4 0.9292447 0.9331695 8 0.5084216 0.8637391 10 0.1316669 0.9742467 14 0.4024661 0.8195820 15 0.5192755 0.8756094 17 0.7339971 0.8266932 NA NA NA NA.1 NA NA NA.2 NA NA and without them > na.omit(dd[dd$b>.8,]) a b 2 0.8288003 0.8263982 4 0.9292447 0.9331695 8 0.5084216 0.8637391 10 0.1316669 0.9742467 14 0.4024661 0.8195820 15 0.5192755 0.8756094 17 0.7339971 0.8266932 Regards Petr > > What commands would help > the table is called AnovaSort with column headings MCI & p-value > > Many thanks in advance > > > > > > ______________________________________________ > [email protected] 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. ______________________________________________ [email protected] 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.
