[R] plotting values "by"

[Deepayan Sarkar]

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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