R help - Aug 2012 - summary() after changing contrasts

Hi,
After running a regression on a factor variable, summary() reports the
coefficients 'nicely,' ie, labelled with a string that is a
concatenation
of the variable name and the factor label.
However, changing the base case a la

contrasts(variable)<-contr.treatment(N, base=x)

results in the coefficients being reported as a less-helpful concatenation
of variable name plus a digit.

Of course, it's possible to map the digit to the appropriate factor label,
but I'm wondering if there's an easy fix...
-Dan

	[[alternative HTML version deleted]]

You might take a look in he car package. if I recall correctly, it includes some
'pretty' versions of contrasts that tidy up the displayed format.
 
S Ellison
> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Daniel Weitzenfeld
> Sent: 09 August 2012 22:08
> To: r-help at r-project.org
> Subject: [R] summary() after changing contrasts
> 
> Hi,
> After running a regression on a factor variable, summary() 
> reports the coefficients 'nicely,' ie, labelled with a string 
> that is a concatenation of the variable name and the factor label.
> However, changing the base case a la
> 
> contrasts(variable)<-contr.treatment(N, base=x)
> 
> results in the coefficients being reported as a less-helpful 
> concatenation of variable name plus a digit.
> 
> Of course, it's possible to map the digit to the appropriate 
> factor label, but I'm wondering if there's an easy fix...
> -Dan
> 
> 	[[alternative HTML version deleted]]
> 
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