adding error bars to lattice plots

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Mario
Aigner-Torres
Sent: Thursday, October 20, 2005 9:52 AM
To: Berton Gunter; r-help at stat.math.ethz.ch
Subject: Re: [R] adding error bars to lattice plots


Thanks Bert!

I have right now a dataset that looks like this:

tail(partition, 3)

element run logfO2 TC buffer xAn sdXan Di Disigma
416 Al 36 -0.68 1180 AIR 0.734 0.007 2.10 0.02
417 Ca 36 -0.68 1180 AIR 0.734 0.007 1.29 0.02
418 Na 36 -0.68 1180 AIR 0.734 0.007 1.16 0.06

Basicaly I would like to insert error bars into a xyplot like this

xyplot(log10(Di) ~ TC | element.ord, groups=buffer.ord, #pch=16,

+ #subset=no1140,
+ data=partition,
+ auto.key=list(columns=3),
+ )

How could llines, lsegments or perhaps panel.arrows look like?

I appreciate any help on this.

Best regards,

Mario


On 10/19/05, Berton Gunter <gunter.berton at gene.com> wrote:

?llines, lsegments and the like can be used in the panel 

functions to draw

any sort of error bar that you can compute from the x,y,... 

data of the

panel.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA

"The business of the statistician is to catalyze the 

scientific learning

process." - George E. P. Box

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Mario
Aigner-Torres
Sent: Wednesday, October 19, 2005 2:34 PM
To: r-help at stat.math.ethz.ch
Subject: [R] adding error bars to lattice plots

Dear R-Users,

how to include error bars within lattice?
How should the panel = function(x,y,...){
looks like?
Does panel.arrows works here as well?

I appreciate any help on this.

Regards,

Mario AT

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