R help - Aug 2010 - How to make flowchart in R?

I have a large dataset and I would like to make some kind of flowchart
from this dataset. The idea is to show rowcounts from data subsets:

                  data1
             rows= 100000
                     |
                    / \
                   /   \
      males          females,
  rows=500000   rows=500000
                          /\
                         /  \
                        /    \
         brown hair       white hair
         rows=25000    rows=25000

Any ideas how this can be done using R?

-J

http://cran.r-project.org/web/packages/diagram/vignettes/diagram.pdf

It might be difficult to include very large amounts of data, but names and
counts should be fine.
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On Aug 16, 2010, at 12:59 PM, johannes rara wrote:
> I have a large dataset and I would like to make some kind of flowchart
> from this dataset. The idea is to show rowcounts from data subsets:
> 
>                  data1
>             rows= 100000
>                     |
>                    / \
>                   /   \
>      males          females,
>  rows=500000   rows=500000
>                          /\
>                         /  \
>                        /    \
>         brown hair       white hair
>         rows=25000    rows=25000
> 
> Any ideas how this can be done using R?

One approach is using Sweave along with PSTricks, specifically the pst-tree
package.

More information and examples here:

  http://tug.org/PSTricks/main.cgi?file=pst-tree/pst-tree

The Indian TUG also has a pretty decent tutorial series on using PSTricks here:

  http://sarovar.org/projects/pstricks/

with Chapter 11 focusing on creating trees:

  http://sarovar.org/frs/download.php/1188/chap11.pdf


I use pst-tree (and pst-node) to create subject disposition flow charts and
stratification trees for clinical studies. I create the framework for the TeX
graphic and then use \Sexpr{}'s to fill in the counts, percentages, other
annotation, etc. as required from the data.


HTH,

Marc Schwartz