[R] plotting values "by"

Deepayan Sarkar deepayansarkar at yahoo.com
Tue Dec 11 19:08:15 CET 2001



The lattice package is probably the best way to get most of the plots you want.
Could you give some more details on what problems you are having with it?

>From what you've written, it might help you to know that 

1. the functions xyplot() etc don't draw the plots themselves, they produce
   "trellis" objects which need to be `print'ed to get the actual plots. This
   is done by default when you call the functions interactively, but not when
   you call it within a function, say.

2. You need to use the trellis.device() function (see doc) to get postscript
   output.



--- "Jeff D. Hamann" <jeff_hamann at hamanndonald.com> wrote:
> > 1) what kind of plot? What plotted against what?
> > 2) same plot, or same page (i.e. same axes, or lots of little plots
> > on the one page)?
> 
> well both actually. I would like to plot may (scatterplots or functions) in
> one plot using color to separate the different species or fits, and I would
> like to plot lots of little histograms over time in lots of little plots on
> the page.
> 
> I've been able to plot lots of histograms in a page, although I need to
> figure out how to use expf as a weight. basically I need to plot lots of
> little bar charts, which I can do using par( mfcol=c(y,x)).
> 
> I've also had some trouble using the lattice package in a R script. when I
> type the command xyplot( ht ~ dbh | species ) i get the plots i'm looking
> for, when I try to produce the plots (to the screen) I get nothing. I need
> to try to produce an eps file though.
> 
> thanks,
> jeff.
> 
> 
> ----- Original Message -----
> From: "Jason Turner" <jasont at indigoindustrial.co.nz>
> To: "Jeff D. Hamann" <jeff_hamann at hamanndonald.com>
> Sent: Tuesday, December 11, 2001 5:08 AM
> Subject: Re: [R] plotting values "by"
> 
> 
> > Don't know if this has been answered or not...
> >
> > On Sat, Dec 08, 2001 at 10:52:57AM -0800, Jeff D. Hamann wrote:
> > > I would like to produce a set of values, on the same chart, from an sql
> > > table that is structured like...
> > >
> > > species dbh ht expf
> > > DF 1.2 8.9 10.0
> > > DF 2.4 17.3 12.4342
> > > DF 3.1 20.9 56.76
> > > PP 2.3 16.9 100.0
> > > PP 12.8 97.3 40.3
> > > PP 8.2 63.0 98.34
> > > .
> > > .
> > > .
> > > SS blah, blah, blah...
> > >
> > > is it possible to, using a single command in the plot command to plot
> the
> > > different groups on the same plot or will I have to iterate through the
> data
> > > set (sql select) and use the points() to get this done? Is it possible
> to do
> > > the same to produce histograms...
> > >
> >
> > 1) what kind of plot? What plotted against what?
> > 2) same plot, or same page (i.e. same axes, or lots of little plots
> > on the one page)?
> >
> > Jason
> > --
> > Indigo Industrial Controls Ltd.
> > 64-21-343-545
> > jasont at indigoindustrial.co.nz
> >
> 
>
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