[R] Plot regression results with various predictors.

PIKAL Petr petr.pikal at precheza.cz
Wed May 28 11:54:08 CEST 2014


Hi


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of phil
> Sent: Wednesday, May 28, 2014 10:41 AM
> To: r-help at r-project.org
> Subject: Re: [R] Plot regression results with various predictors.
>
> Sorry for not explaining it further. plm() is the regression command
> for panel data, i.e., similar to lm() for simple linear regressions. I
> run the
> plm() and get an output which I call here POLS. Next I simply use
> plot(POLS) which looks like
> <http://r.789695.n4.nabble.com/file/n4691355/plot_of_results_-
> _forum.jpg>
>
> I am not totally unhappy about this plot. But my main problem is what
> is the indication of the axis. About the y-axis I know that it is my
> response variable. But what is plotted on the x-axis?

I am not familiar with plm function, in documentation there is no plot method indicated but it definitely has plot method.

See
methods(plot)

Because plot.plm is nonvisible you cannot see the code just by plot.plm but you can see the code of plotting function by

plm:::plot.plm

To see what the function is really plotting you can go through source code and/or debug and inspect each object produced by the function
debug(plm:::plot.plm)
plot(POLS)

I get also this error which means that the plot.plm function is not working properly even with toy data from package (Produc)
Error in xy.coords(x, y) : 'x' and 'y' lengths differ

It ends on this line after plotting points and axes.
debug: lines(c(xmin, xmax), c(ymin, ymax), col = cols[i])

So try to address directly the maintainer.

Regards
Petr


>
> Further, how can I implement the regression line? And obviously, what
> about adding a legend for the points since each color represents a
> different country in my case.
>
> I hope I could clarify my problem a little bit. Do you have any
> suggestions?
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Plot-
> regression-results-with-various-predictors-tp4691307p4691355.html
> Sent from the R help mailing list archive at Nabble.com.
>
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