Message-ID: <loom.20121004T010833-558@post.gmane.org>
Date: 2012-10-03T23:09:53Z
From: Ben Bolker
Subject: Error in if (any(ch)) { : missing value where TRUE/FALSE needed
<liang.che <at> us.pwc.com> writes:
>
> Can someone please help with the error message below?
>
> thanks!
>
> Start: AIC=-Inf
> value ~ 1 + Core_CPI__ + GDP_change + Unemployment + housing +
> interest + S_P + d1 + d2 + d3
>
> Error in if (any(ch)) { : missing value where TRUE/FALSE needed
> In addition: Warning message:
> attempting model selection on an essentially perfect fit is nonsense
>
Without a reproducible example we can't help.
(See http://tinyurl.com/reproducible-000 , for example)
Have you checked to see if you are overfitting?
Have you possibly read in a numeric variable as a factor by
accident?
Ben Bolker