[R] barchart but with boxes

[Daisy Englert Duursma]

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.

Thanks,
Daisy


-- 
Daisy Englert Duursma

Room E8C156
Dept. Biological Sciences
Macquarie University  NSW  2109
Australia