R help - Jul 2017 - cannot use package RcmdrPlugin.plotByGroup

Dear Lu Wei,

I'm the author of the Rcmdr package but not of RcmdrPlugin.plotByGroup, so
if there really is a problem -- which isn't apparent from your message --
then you may wish to contact the package author.

First, as a general matter, menu items in the Rcmdr are grayed out if
they're inappropriate in the current context. Rcmdr plug-in authors can use
the same mechanism. So, for example, most menu items are grayed out before you
read a data set, and menu items that require a categorical variable will be
grayed out if there are no factors (or character variables or logical variables)
in the active data set.

Second, Rcmdr plug-in packages aren't loaded by the
library("Rcmdr") command. You can load a plug-in from the Rcmdr Tools
menu; and many (but not all) Rcmdr plug-in packages can be loaded directly via
the library() command, in which case the Rcmdr package is also loaded. I
don't know whether library("RcmdrPlugin.plotByGroup") will work,
but you can try it.

I hope this helps,
 John

--------------------------------------
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: socserv.mcmaster.ca/jfox



> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Lu Wei
> Sent: Saturday, July 22, 2017 12:49 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] cannot use package RcmdrPlugin.plotByGroup
> 
> Greetings,
> 
> I am a new use of R, starting from R-commander.
> 
> I find that the default quantile-comparison (Q-Q plot) of R-commander
> has no group option, and I happened to notice RcmdrPlugin.plotByGroup in
> the packages list. As the name is so explicit, I installed it, loaded
> it, R-commander restarted, but the 3 menu item under Graphs->plot by
> group are all greyed out. What could be wrong?
> 
> --
> Regards,
> Lu Wei
> PGP key ID: 0x A12F EF75 92CC E1EA
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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On 2017-7-23 6:21, Fox, John wrote:
> Dear Lu Wei,
> 
> I'm the author of the Rcmdr package but not of
> RcmdrPlugin.plotByGroup, so if there really is a problem -- which
> isn't apparent from your message -- then you may wish to contact the
> package author.
> 
> First, as a general matter, menu items in the Rcmdr are grayed out if
> they're inappropriate in the current context. Rcmdr plug-in authors
> can use the same mechanism. So, for example, most menu items are
> grayed out before you read a data set, and menu items that require a
> categorical variable will be grayed out if there are no factors (or
> character variables or logical variables) in the active data set.
> ...
Thanks for the reply. I change to another data set and the menu is
available. I did not know the type of variable -- I am a newbie who is
searching a quick solution, that's why I try R-commander. But after some
test I find that plugin's output is not exactly what I want.

I am seeking a way to visualize data by plotting grouped box and
distribution chart. The latter may be called Q-Q chart, which I just
learned from R, though it seems not exactly the same as I have seen
below. I hope the groups are in the same chart for comparison, like this:
http://cubeupload.com/im/WFc4CC.png

or even plot a set of variables:
http://cubeupload.com/im/wK69NN.jpg

These charts are produced by Minitab. The norm-axis is not the same as
Q-Q chart in R, but I think they are equivalent. Is it right?

I hope you or the author of RcmdrPlugin.plotByGroup could implement the
feature in the picture I posted. This "distribution chart" or Q-Q
chart
is the most I want from a statistic tool, since it gives full
information of experiment data, and putting groups together in a chart
for comparison is the ultimate judgement.

Thank you for making R an easy tool to learn and use. Great job.

-- 
Regards,
Lu Wei
PGP key ID: 0x A12F EF75 92CC E1EA