[R] cannot use package RcmdrPlugin.plotByGroup

Fox, John jfox at mcmaster.ca
Mon Jul 24 14:29:10 CEST 2017

Dear Lu Wei,

> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Lu Wei
> Sent: Sunday, July 23, 2017 11:28 AM
> To: r-help at stat.math.ethz.ch
> Subject: Re: [R] cannot use package RcmdrPlugin.plotByGroup
> On 2017-7-23 20:41, Fox, John wrote:> ...
> > The Rcmdr uses the qqPlot() function in the car package. In the next
> > version of the car package, qqPlot() will be able to plot by groups,
> > and when that happens, I'll incorporate the feature in the Rcmdr.
> >
> > More generally, however, if you learn to write R commands you'll be
> > able to make customized plots. It would be easy to duplicate the plots
> > that you show, for example.
> >
> >
> Thanks you for the suggestions. It seems I will use R often afterwards, so I will
> study the manuals and commands little by little. I do not reject the command
> line geek style, but the beginning steps and basic functions should be easy.
> Your Rcmdr offered this to new users; without it, I won't begin to learn and use
> R.
> Your observations of my posted image are correct. So that is my expectation of
> grouped QQ plot. I hope it will come to Rcmdr soon. Also, thanks Google, I find
> a way to do that:
> http://www.sthda.com/english/wiki/ggplot2-qq-plot-quantile-quantile-graph-
> quick-start-guide-r-software-and-data-visualization
> That shape or color grouping in one chart is exactly what I need. Although I
> don't quite understand the commands used, I think I can copy and modify the
> commands a little to do my work. Could you incorporate it in the Rcmdr?
> Maybe consider it in your spare time.

As I already said, qqPlot() in the next version of the car package will be able to plot by groups; the graphs will be in separate panels, will have a common y-axis by default, and will show a confidence envelope. They will not look like the graphs that you created, and as a general matter the Rcmdr doesn't provide customized graphs, which are much easier to draw using R commands than in a GUI. This addition will not happen soon.


> --
> Best regards,
> Lu Wei
> PGP key ID: 0x A12F EF75 92CC E1EA
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