[R] adding grid lines to an xyplot when there is only 1 panel - corrected

[ken knoblauch]

Sorry, some things got garbled in that request for help that might make 
my request
unintelligible, probably it being too late at night when I posted, here 
is the corrected function
call for which I would like to learn how to add horizontal grid lines.  
Any suggestions
would be appreciated.  Apologies for the posting error

xyplot(est ~ STE, data = all, groups = AREA, type = "b",
   		auto.key = list(space = "right"))

For the record, I'm working with Mac OS X 10.4.6 with R 2.3

Thank you.

> I've been struggling with this for a while and cannot get it to work.
> Is there a simple way to add grid lines ---- I'd like to only add the
> horizontal ones --- when using the groups argument in xyplot?
> I can get the grid lines to plot, or the points/lines, but not both.
> Here is a simple example of the sort of thing that I'm working with.
> Thanks, in advance.
>
>  >all
>        est  STE AREA
>    -0.229    V1   V1
>    -1.129    V1   V2
>    -2.084    V1   V4
>    -2.918    V1   V3
>    -0.548    V2   V1
>    -0.217    V2   V2
>    -1.937    V2   V3
>    -1.205    V2   V4
>    -4.126    V4   V1
>    -1.481    V4   V2
>    -2.070    V4   V3
>    -0.042    V4   V4
>
> xyplot(est ~ ISITE, data = all2, groups = AREA, type = "b",
>   		auto.key = list(space = "right"))
>

Ken Knoblauch

-- 
Ken Knoblauch
Inserm U371
Cerveau et Vision
Dept. of Cognitive Neuroscience
18 avenue du Doyen Lépine
69500 Bron
France
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