That fixed it! Thanks to all who replied.
On Thu, Jan 14, 2010 at 9:13 AM, S Ellison <s.elli...@lgc.co.uk> wrote:
> I think you should rather look at the origin= parameter in barchart. See
>
> ?panel.barchart for a discussion of this exact problem:
> " origin: the origin for the bars. For grouped displays with 'stack
> =
> TRUE', this argument is ignored and the origin set to 0.
> Otherwise, defaults to 'NULL', in which case bars start at
> the left (or bottom) end of a panel. This choice is
> somewhat
> unfortuntate, as it can be misleading, but is the default
> for
> historical reasons. For tabular (or similar) data, 'origin
> =
> 0' is usually more appropriate; if not, one should
> reconsider
> the use of a bar chart in the first place (dot plots are
> often a good alternative). "
>
> The result of setting origin is more sensible:
> require(lattice)
> da <- expand.grid(A=c("a","b"), x=1:4)
> da$y <- c(1,5,6,3,2,0,6,0)
>
> barchart(y~x|A, data=da, horizontal=FALSE)
>
> barchart(y~x|A, data=da, horizontal=FALSE, origin=0)
>
> >>> Walmes Zeviani <walmeszevi...@hotmail.com> 14/01/2010 14:49:01 >>>
>
> Rex,
>
> I think this problem can be solved using xlim()/ylim() argument. Look
> at the
> follwing code:
>
> require(lattice)
> da <- expand.grid(A=c("a","b"), x=1:4)
> da$y <- c(1,5,6,3,2,0,6,0)
>
> barchart(y~x|A, data=da, horizontal=FALSE)
>
> barchart(y~x|A, data=da, horizontal=FALSE,
> ylim=c(0, 1.05*max(da$y)))
>
> At your disposal.
> Walmes.
>
>
>
> Rex C. Eastbourne wrote:
> >
> > When I use barchart (with default formatting options), I get bars
> whose
> > lengths/heights are not proportional to their value. For example:
> >
> > http://drop.io/wbagm6s/asset/capture-png
> >
> > Many of the values in this chart are 1; however, because the blue
> bars
> > extend to the left of the "0" tick mark, those bars appear to
> represent
> > higher numeric values. Is there a way to make the length of the bar
> > proportional to the data value, so that people looking at my chart
> are not
> > misled?
> >
> > Thanks,
> >
> > Rex
> >
> > [[alternative HTML version deleted]]
> >
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> >
> >
>
>
> -----
> ..oooO
>
> ..................................................................................................
> ..(....)... 0ooo... Walmes Zeviani
> ...\..(.....(.....)... Master in Statistics and Agricultural
> Experimentation
> ....\_)..... )../.... walmeszevi...@hotmail.com, Lavras - MG,
> Brasil
> ............
>
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