[R] plotting multiple variables in 1 bar graph

[PIKAL Petr]

Hi

see in line

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of David Carlson
> Sent: Tuesday, October 23, 2012 6:47 PM
> To: 'Macy Anonuevo'; r-help at r-project.org
> Subject: Re: [R] plotting multiple variables in 1 bar graph
> 

<snip>

> 
> 
> 
> >
> > >
> > > What I need now is to plot all the variables in 1 site as they
> change
> > > over time.
> >
> > Something like
> >
> > barplot(VADeaths, beside = TRUE,
> >         col = c("lightblue", "mistyrose", "lightcyan",
> >                 "lavender", "cornsilk"),
> >         legend = rownames(VADeaths), ylim = c(0, 100)) title(main =
> > "Death Rates in Virginia", font.main = 4)
> >
> 
> >> If I understand the code correctly, this means that only the
> variable
> "VADeaths" is plotted over time? I'm hoping to have multiple variables
> plotted over time, with the bars clustered by variable so that you can
> see how each variable changes over time.

Not exactly. VADeaths is a matrix not a single variable. 

> str(VADeaths)
 num [1:5, 1:4] 11.7 18.1 26.9 41 66 8.7 11.7 20.3 30.9 54.3 ...
 - attr(*, "dimnames")=List of 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  ..$ : chr [1:5] "50-54" "55-59" "60-64" "65-69" ...
  ..$ : chr [1:4] "Rural Male" "Rural Female" "Urban Male" "Urban Female"

>
See ?barplot help page for details.

Regards
Petr


> 
> 
> 
> >
> >
> > or maybe you could try ggplot2
> >
> 
> >> I tried looking through ggplot2 and I don't understand the code. I
> don't
> even know where to start.
> 
> 
> 
> 
> >
> > Regards
> > Petr
> >
> >
> >
> > >
> > > What Excel produced:
> > >
> <http://r.789695.n4.nabble.com/file/n4647099/abdeens_benthic_cover.jpg>
> > > (The image has mean %cover as the y-value instead of mean count but
> the
> > > example still applies)
> > >
> > > I've spent several hours looking for code to do this but didn't
> find
> > > anything. I'd use the Excel graph except that it doesn't have the
> sd
> or
> > > se bars.
> > >
> > >
> > >
> > >
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