[R] barchart but with boxes

[Deepayan Sarkar]

On Sun, Jun 6, 2010 at 11:53 PM, Daisy Englert Duursma
<daisy.duursma at gmail.com> wrote:
> Hello r-help.
>
> I have been working on making a graph and have several solutions but
> they are tedious at best.
>
> Here is an example dataset:
>
> catg<-(c(1,2,3,2,4,3,2,1,4,3,1))
> min<-(c(1,2,3,3,4,5,6,6,3,2,1))
> max <-(c(10,6,8,6,7,3,10,9,10,8,9))
> cbind(min,max,catg)
>
> What I want to create is a basically a bar chart,  but I define the
> min (min) and max (max) for the bars.
> These bars are separated into three categories (catg). Within each
> category the bars are allowed to overlap. I set the bars to have a
> transparent color so that I can see agreement of the  items within a
> category based on the darkness of color.
>
> One method I came up with, is to use ggplot2 and geom_tile but then I
> have to give x,y coordinates for every corner of every box.
> Considering the size of my real datasets, and not this little example
> dataset, this seems annoying.
>
> I could even just graph lines with the defined min and max. With that
> I could make the lines thick and achieve the effect I am looking for.
>
> Hopefully I have missed an obvious method to graph this.

One option to look at is segplot() in the latticeExtra package.

-Deepayan