The function i am looking is a bars from the mean points of the plot in
boxplot style. I tryed several forum but I have no clear the way to create
these bars.

Gianni

On Mon, May 28, 2012 at 7:13 PM, David Winsemius <dwinsemius@comcast.net>wrote:

>
> On May 28, 2012, at 9:55 AM, gianni lavaredo wrote:
>
>  Dear Researchers,
>>
>> sorry for this simple question. I  have a point plot with mean values and
>> i
>> wish to plot line with Standard Deviation as "Whiskers". I calculate the
>> mean+sd and mean-sd, but i can not figure out the way to add the line.
>>
>> mydata <-
>> data.frame(mean=c(0.42,0.41,0.**41,0.43,0.45,0.43,0.43,0.42,0.**
>> 44,0.45,0.45,0.45,0.46,0.43,0.**42,0.37,0.44,0.46,0.46,0.39,0.**40),
>>
>> sdUP=c(0.58,0.56,0.55,0.57,0.**61,0.55,0.57,0.59,0.61,0.60,0.**
>> 57,0.60,0.62,0.57,0.59,0.56,0.**57,0.61,0.61,0.56,0.54),
>>
>> sdDOWN=c(0.26,0.26,0.28,0.29,**0.30,0.30,0.29,0.26,0.28,0.31,**
>> 0.34,0.30,0.31,0.30,0.25,0.19,**0.31,0.31,0.31,0.22,0.25))
>>
>> plot(mydata$mean,
>>   type="o",
>>   ylab="mean",
>>   xlab="class")
>>
>> thanks in advance and sorry for any disturb
>>
>
> If you tried lines() usin either sdUP or sdDOWN you saw nothing because
> the ylim was set by default using ony hte information in the mean vector.
>
> Try:
>
> > plot(mydata$mean,
> +    type="o",
> +    ylab="mean",
> +    xlab="class", ylim=range(c(mydata$sdUP, mydata$sdDOWN)))
> > lines(mydata$sdDOWN, col="blue", lty=3)
> > lines(mydata$sdUP, col="blue", lty=3)
>
>
> --
> David.
>

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