R help - Oct 2012 - Error in if (any(ch)) { : missing value where TRUE/FALSE needed

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 


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<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

On 03.10.2012 19:47, liang.che at us.pwc.com wrote:
> Can someone please help with the error message below?
Not really, the message says it all: You cannot improve the AIC since it 
is numerically -Inf already!

Uwe Ligges



>
> 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
>
>
> ______________________________________________________________________
> The information transmitted, including any attachments, is intended only
for the person or entity to which it is addressed and may contain confidential
and/or privileged material. Any review, retransmission, dissemination or other
use of, or taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited, and all liability
arising therefrom is disclaimed. If you received this in error, please contact
the sender and delete the material from any computer. PricewaterhouseCoopers LLP
is a Delaware limited liability partnership.  This communication may come from
PricewaterhouseCoopers LLP or one of its subsidiaries.
>
> 	[[alternative HTML version deleted]]
>
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