[R] aov() usage
R. Michael Weylandt
michael.weylandt at gmail.com
Mon Oct 8 09:17:26 CEST 2012
On Mon, Oct 8, 2012 at 3:49 AM, Jhope <jeanwaijang at gmail.com> wrote:
> Hi R-listers,
> I am wondering if the function aov() in plyr is appropriate for two
> different types of tests:
> 1) > summary(aov(EDI ~ VegIndex, data=data.to.analyze))
> 2) > summary(aov(HSuccess ~ VegIndex + Aeventexhumed +
> VegIndex:Aeventexhumed, data=data.to.analyze))
> the later inclusive of an interaction of the two explanatory variables.
> This is for obtaining P value and F statistics.
> Please advise, Jean
1) aov() is not from plyr. If you type "aov" at the prompt (no
parentheses) you'll see its clearly from stats.
2) You can write
hSuccess ~ VegIndex + Aeventexhumed + VegIndex:Aeventexhumed
more easily as
hSuccess ~ VegIndex * Aeventexhumed
3) Yes it should. Run
to see how.
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