[R] plot

[Greg Snow]

Can you really see much of the data in a 26*31 3d barplot?  It seems like most info would be hidden behind the first few rows and it would be so cluttered that you would not be able to make out much of anything from it.

Why not try a line plot instead (year as the x axis, each region a different year).  Here is a quick example:

> data(votes.repub, package='cluster')
> matplot( t(votes.repub[1:31, 1:26]), type='l')
> 

Even better would be to group some of the regions together and use xyplot from the lattice package and have a panel for each group of regions (fewer lines per panel should be easier to see detail).

You could also use the image function (or levelplot from lattice) to create a 26*31 grid with colors used for the 3rd dimension (can be good for overall patterns, not so good for looking at detail).

Hope this helps,

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
 
 

> -----Original Message-----
> From: Dong GUO ¹ù¶« [mailto:guo.dong99 at gmail.com] 
> Sent: Friday, July 27, 2007 12:09 PM
> To: Greg Snow
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] plot
> 
> Many thanks, Greg and Justin.
> 
> The matrix is just a 26*31 matrix - 26 years, 31 regions. I 
> am know to R, just dont know how to attach the data here yet..
> 
> As I have such matrices for nine indicators for all regions, 
> so i could show some differences by 3D plot, which I did 
> similar things in Excel. I am sure there is a way to do it in R
> 
> On 7/27/07, Greg Snow <Greg.Snow at intermountainmail.org> wrote:
> > Graphs that rely on 3-d effects tend to distort the data 
> rather than enlighten the viewer.  If your goal is to distort 
> the data (which I doubt), then most of us don't want to help. 
>  On the other hand, if you really do want to enlighten the 
> viewer (even if that is just you), then tell us what your 
> data is like and what you want to learn from it, and we will 
> be happy to give you advice on creating useful graphs.
> >
> > --
> > Gregory (Greg) L. Snow Ph.D.
> > Statistical Data Center
> > Intermountain Healthcare
> > greg.snow at intermountainmail.org
> > (801) 408-8111
> >
> >
> >
> > > -----Original Message-----
> > > From: r-help-bounces at stat.math.ethz.ch 
> > > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Dong GUO ??
> > > Sent: Friday, July 27, 2007 8:45 AM
> > > To: r-help at stat.math.ethz.ch
> > > Subject: [R] plot
> > >
> > > Greetings to the group,
> > >
> > > I would like to know if some one could help me with plot 
> 3-d column 
> > > graph of a matrix (3-d column graph in Excel).
> > >
> > > Many thanks in advance.
> > >
> > > Regards,
> > > Dong
> > >
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> > > and provide commented, minimal, self-contained, reproducible code.
> > >
> >
> >
>