Hi cbind(some numeric and not numeric columns)
gives you all columns to be character and when you make data.frame from it it is converted to factors. so > abarley = data.frame(ayield,avariety,ayear,asite) brings you close but than you need ayear to be factor. Either convert it in data frame or on fly barchart(ayield ~ avariety | asite, data = abarley, groups = factor(ayear), layout = c(1,5) ) HTH Petr BTW. If you encounter error other than "Error: syntax error in: .... it's time to look at your data by ?str, class, typeoff, ... and any other structure and type revealing tools. Cheers. On 21 Mar 2006 at 12:05, [EMAIL PROTECTED] wrote: Date sent: Tue, 21 Mar 2006 12:05:27 +0100 From: [EMAIL PROTECTED] To: [email protected] Subject: [R] How to use: library lattice: barchart > Dear ladies and gentlemen! > > In the help text for the xyplot (library(lattice), help(xyplot)) is an > example given how one can use barchart: > > barchart(yield ~ variety | site, data = barley, > groups = year, layout = c(1,6), > ylab = "Barley Yield (bushels/acre)", > scales = list(x = list(abbreviate = TRUE, > minlength = 5))) > > I want my data to be represented just in the same way. But when I try > it like this: > > > ayield = c(2,3,5,6,3,4,7,8,9,2,3,5,6,1,2,3,4,2,6,8) > avariety = c(rep("A",5),rep("B",5),rep("C",5),rep("D",5)) > ayear = (c(rep(1931,10),rep(1932,10))) > asite = c(rep(c("iu","gt","jt","jhzt","tr"),4)) > abarley = data.frame(cbind(ayield,avariety,ayear,asite)) > > barchart(ayield ~ avariety | asite, data = abarley,groups = ayear, > layout = c(1,5) ) > > it looks totaly different and I get the error message: > "x should be numeric in: bwplot.formula(x = ayield ~ avariety | asite, > data = list(ayield = c(2," > > What did I do wrong? > Can anybody help me? > > Best regards, thank you very much > > > Claudia Paladini > > ______________________________________________ > [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 Petr Pikal [EMAIL PROTECTED] ______________________________________________ [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
