Dear all, I have divided two vectors:
Np.occup97.98<- as.data.frame(cbind(site = levels(sums$site), Np.occup97.98 = sums$Ant.Nptrad97.98/Ant.trad$Ant.trad97.98)) > Np.occup97.98 site Np.occup97.98 1 erken97 0.342592592592593 2 erken98 0.333333333333333 3 rormyran 0.48471615720524 4 valkror 0.286026200873362 However, at a later stage of the analysis I want > round(Np.occup97.98[,2], 2) Error in Math.factor(x, digits) : "round" not meaningful for factors neither did this work: > round(Np.occup97.98[,2], 2) Error in Math.factor(x, digits) : "round" not meaningful for factors or this: > round(as.numeric(Np.occup97.98[,2]), 2) [1] 3 2 4 1 > because, as clearly written in the help file: "as.numeric for factors yields the codes underlying the factor levels, not the numeric representation of the labels." I've discovered this solution: > Np.occup97.98<- as.data.frame(cbind(site = levels(sums$site), + Np.occup97.98 = round(sums$Ant.Nptrad97.98/Ant.trad$Ant.trad97.98,2))) > > Np.occup97.98 site Np.occup97.98 1 erken97 0.34 2 erken98 0.33 3 rormyran 0.48 4 valkror 0.29 However, I would like to do this rounding later. Could someone give a tip. I think that I would have been helped by a sentence in help(as.numeric). Thanks in advance. Sincerely, Tord ----------------------------------------------------------------------- Tord Snäll Avd. f växtekologi, Evolutionsbiologiskt centrum, Uppsala universitet Dept. of Plant Ecology, Evolutionary Biology Centre, Uppsala University Villavägen 14 SE-752 36 Uppsala, Sweden Tel: 018-471 28 82 (int +46 18 471 28 82) (work) Tel: 018-25 71 33 (int +46 18 25 71 33) (home) Fax: 018-55 34 19 (int +46 18 55 34 19) (work) E-mail: [EMAIL PROTECTED] Check this: http://www.vaxtbio.uu.se/resfold/snall.htm! ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help