search for: sporangia

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]]

...l and don’t 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 don’t have a clue!!! I don’t 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(&quot...