Thank you for your response, which is a partial solution to my problem. Actually, I would like to do the following plot. I have a data frame that includes the following variables: time, y=a response variable experimentally determined, ystd=its standard deviation, m=the modeled/simulated values for y, and F a classification/grouping variable. I would like to have a treillis plot, each panel corresponding to a level of F and includes y plotted against time with dots as symbol and with bars for standard deviation using ystd and m superimposed , plotted as a line. Thanks for your help, Chris
Petr Pikal wrote: > Hi > > Well, you did not specified what you have tried to do and how did you > fail but > > On 2 Oct 2006 at 16:41, Christophe Nguyen wrote: > > Date sent: Mon, 02 Oct 2006 16:41:29 +0200 > From: Christophe Nguyen <[EMAIL PROTECTED]> > To: [email protected] > Subject: [R] Problems with graphics > > >> Dear all, >> I am a SAS user, who's trying R. I am a little bit lost for graphics. >> What is the simplest way for plotting y as a function of x with one >> symbol (line or dot) for each level of a class variable z (for SAS >> > > If z is factor > plot(x,y pch=as.numeric(z), ...) > > otherwise you need to change it to one. > > BTW, you can use the similar approach with lines and points - col, > lwd, cex,... and othe parameters. > > > >> langage= plot x*y=z). Can I add vertical bars for standard deviation >> > > there are various options, one is to use arrows with angle=90. > > arrows(x,y,x, y+ystd, angle=90) > > >> stored in a separate variable (say ystd). Finally, is it possible to >> do all this with xyplot function arranging plots according to A and B >> factor: xyplot(y~x|A*B) with as many plots and symbol as there is >> > > that is completely different story and you probably need to elaborate > your own panel.function. > > HTH > Petr > > >> levels in the z variable for each panel? Thanks for the help. Chris >> >> -- >> ___________________________________________________ >> >> Christophe NGUYEN >> >> UMR 1220 INRA-ENITAB >> Transfert sol-plante et cycle des éléments minéraux >> dans les écosystčmes cultivés" >> >> Centre INRA de Bordeaux-Aquitaine >> 71, avenue Edouard Bourlaux, BP 81 >> 33883 Villenave d'Ornon, FRANCE >> >> Tel : 00 33 (0)5 57 12 25 07 >> Fax : 00 33 (0)5 57 12 25 15 >> >> email : [EMAIL PROTECTED] >> page infoservice: http://www.bordeaux.inra.fr/tcem >> >> __________m°O°m____________________________________ >> >> ______________________________________________ >> [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. >> > > Petr Pikal > [EMAIL PROTECTED] > > > > > > -- ___________________________________________________ Christophe NGUYEN UMR 1220 INRA-ENITAB Transfert sol-plante et cycle des éléments minéraux dans les écosystèmes cultivés" Centre INRA de Bordeaux-Aquitaine 71, avenue Edouard Bourlaux, BP 81 33883 Villenave d'Ornon, FRANCE Tel : 00 33 (0)5 57 12 25 07 Fax : 00 33 (0)5 57 12 25 15 email : [EMAIL PROTECTED] page infoservice: http://www.bordeaux.inra.fr/tcem __________m°O°m____________________________________ ______________________________________________ [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.
