[R] Get variable names from results of lm()

[Peter Ehlers]

On 2012-05-23 09:55, R. Michael Weylandt wrote:
> I think the easiest that comes to mind is simply
>
> names(coef(myMod))
>
> But did you look at myMod$terms[[3]] ? That seems to be the RHS of the
> formula input (in the few cases I tried)
>
> Best,
> Michael

It depends a bit on just what the OP wants. In case one of the
predictors is a factor, say 'grp' with levels c('A','B','C'), the
coefs will include the names 'grpB' and 'grpC'. If only the
name 'grp' is wanted, one could use myMod$terms[[3]] or
equivalently formula(myMod)[[3]]. It might be instructive for the
OP to look at as.list(formula(myMod)). formula(myMod) is a
language object which has the tilde operator operate on
the LHS (component 2) and the RHS (component 3).

Peter Ehlers

>
> On Wed, May 23, 2012 at 10:58 AM, jdub<jack at ramas.com>  wrote:
>>
>> What is the best way to get the variable names used in lm() from its
>> results?
>>
>> Stumbling around I found I could get the response variable name from
>>
>> myMod$terms[[2]]
>>
>> but using
>>
>> myMod$terms[[1 ]]
>>
>> gives a tilda.
>>
>> I found the names buried in other places in the model object and in the
>> summary of the model, but is there a more direct way, similar to using
>> coef(myMod) to get the coefficients?
>>
>>
>> --
>> View this message in context: http://r.789695.n4.nabble.com/Get-variable-names-from-results-of-lm-tp4631095.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>
> ______________________________________________
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