You'll need to supply a reproducible example:
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
Cheers,
Michael
On Thu, Oct 4, 2012 at 2:19 PM, Dereje Bacha <d_bacha at yahoo.com>
wrote:> Hi all,
>
> When I run a regression, I got the following response. your help is
appreciated.
>
> Error in constants (lhs, cnames_symb) :
> The hypothesis
> "Cost_PKL-QK.X_(Intercept)=0" is not well formed: contains bad
> coefficient/variable names. In addition:
> Warning message:
> In constants(lhs, cnames_symb) : NAs introduced by coercion
>
> Dereje
> [[alternative HTML version deleted]]
>
>
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