[R] warning in summary(aov())
R. Michael Weylandt
michael.weylandt at gmail.com
Sat Oct 6 12:33:18 CEST 2012
On Sat, Oct 6, 2012 at 9:12 AM, Jhope <jeanwaijang at gmail.com> wrote:
> Hi R-listers,
> I am receiving an error - see below. Aeventexhumed is the event in which
> nesting occured, so it is defined by A, B, C. I thought as a factor was ok,
> tried to change it to as.character but it still gave me the same error. Is
> there something I should do about this error or just ignore it?
> Please advise, Jean
>>summary(aov(EDI ~ HTLIndex + Aeventexhumed + HTLIndex:Aeventexhumed,
> Df Sum Sq Mean Sq F value Pr(>F)
> HTLIndex 6 2.435 0.40575 0.2027 0.9752
> Aeventexhumed 2 4.652 2.32601 1.1619 0.3172
> HTLIndex:Aeventexhumed 11 7.941 0.72192 0.3606 0.9680
> Residuals 98 196.193 2.00197
> 5 observations deleted due to missingness
> Warning message:
> In model.matrix.default(mt, mf, contrasts) :
> variable 'Aeventexhumed' converted to a factor
I think you should have only seen this when Aeventexhumed was a
character -- it's nothing to worry about, just letting you know a
factor conversion had to happen (which is almost surely what you
If you see this when Aeventexhumed is a factor already, that's
somewhat surprising. What does str(data.to.analyze) show you?
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