[R] How to obtain the graph of fitted values against one variable after estimation?
David Winsemius
dwinsemius at comcast.net
Thu Aug 26 05:15:59 CEST 2010
On Aug 25, 2010, at 10:46 PM, Le Wang wrote:
> Hi there,
>
> I have a question regarding the "plot" command after estimation.
>
> Specifically, I estimate a model, say regressing y on x and z. And
> after estimation, I would like to plot the fitted values against x,
> but I don't need that for z. The following command always gives two
> graphs, for both variables x and z.
>
> plot.np<-plot(model, plot.errors.method = "asymptotic")
>
> My question is, what option should I specify in order to get the graph
> for x only?
Pick a constant value for "z" and vary "x" in a dataframe that you
offer to the newdata argument of predict.
?predict
Then plot those values versus x.
>
> I know this is probably a very simple question, but I searched around
> for a while without any luck. Thank you for your time.
--
David Winsemius, MD
West Hartford, CT
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