[R] scatter plot with 1 standard deviation for each point

[Jim Lemon]

FD wrote:
> Hi,
> 
> Could anyone give suggestions how to plot a scatter plot with 1 standard
> deviation for each point. To make it clearer, here is a simple example: the
> scatterplot is plot(X, Y), but I want to add 1 standard deviation according
> to the value of Z for each Y.
> 
> X     Y       Z
> 1     3.5    1.1
> .       .       .
> .       .       .
> .       .       .
> 
Hi FD,
There are lots of ways to do this (if I understand what you want).

library(plotrix)
# first way
plot(1,3.5)
dispbars(1,3.5,1.1)
# second way
plotCI(1,3.5,1.1)

Another version of plotCI lives in the gplots package.
errbar is in the Hmisc and sfsmisc packages.
plotMeans in the Rcmdr package.
and probably quite a few more.

Jim