[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.


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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