On Fri, Apr 23, 2010 at 12:56 PM, Jon Zadra <jr...@virginia.edu> wrote:
> I took a look at xYplot() but it is beyond over-complex, at least for my
> level, and the documentation isn't too clear.
>
> Is there a simple way to make functions like plotCI() and errbar() use the
> lattice reference rather than base graphics?
>
> It seems like creating a plot of two lines across three time points
> separated into two groups should be a very basic, simple thing for a
> statistics program to do. Is there really no way to simply pass a model to
> a plotting function and get something that includes error bars? I just
> wonder if I"m missing how to do this "the easy way."
Try ?segplot in package latticeExtra. E.g.,
require(latticeExtra)
segplot(interaction(group, time) ~ (means-SE) + (means+SE), centers = means,
horizontal = FALSE, draw.bands = FALSE)
YMMV.
-Deepayan
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