[R] Errorbars

[Peter Ehlers]

On 2011-06-17 06:24, anna Harris wrote:
> 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)

(You need to learn to provide *reproducible* code; it will
enhance your chance of obtaining help.)

Try setting the 'pch' parameter to NA or to "".

Peter Ehlers

>
> Cheers
>
> Anna
>
> 	[[alternative HTML version deleted]]
>
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