[R] Errorbars
Hi, Does anyone know how i get rid of the marker point in my error bars? The bars default function (it seems) is to have a dot in the middle of the bar, however i don't want it there. I am using Hmis to draw my errorbars and code is a-as.vector(tapply(Sporangia,list(Host,Isolate),mean)) b-as.vector(tapply(Sporangia,list(Host,Isolate),sd)) c-sqrt(b/36) errbar(c(1.5,2.5,3.5,5.5,6.5,7.5),(tapply(Sporangia,list(Host,Isolate),mean)),a+c,a-c,add=T) Cheers Anna [[alternative HTML version deleted]] __ 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.
[R] Error bars
Hi, Can anyone help with plotting vertical error bars on a bar graph. I have tried following examples online and in the big R book and writing my own function but I have been unsuccessful and donât really have an understanding of what it is I am doing. I have calculated my standard errors so basically just need to draw the bars on the graph but just donât have a clue!!! I donât even know what information people will need to help me.. The code for my graph is: barplot(tapply(Sporangia,list(Host,Isolate),mean),xlab=Isolate,ylab=Mean Sporangia per Needle,col=c(grey39,grey64,grey89),beside=T) col=c(grey39,grey64,grey89) legend(topright,inset=.05,title=Host,c(European Larch,Hybrid Larch,Japanese Larch),fill=col,horiz=FALSE) Any help would be greatly appreciated, Anna [[alternative HTML version deleted]] __ 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.
