[R] command to plot variannce of data (like error bar plot)

[Jim Lemon]

Yogesh Tiwari wrote:
> Hi,
> 
> How to plot a variance over a data point, something like error bar.
> 
Hi Yogesh,

The generic method is to use the "arrows" function, and there are quite 
a few variations on this theme (in alpha order):

brkdn.plot(plotrix)
dispbars(plotrix)
errbar(Hmisc and sfsmisc)
plotCI(gplots and plotrix)
plotMeans (Rcmdr)

and there are surely more error bar functions of which I am unaware.

Jim