[R] expandable tree visualization

[Zhesi He]

Hi,

Sorry if the answer is really simple. But I'm looking for a expandable 
tree visualisation (like file organisation with plus or minus sign on 
the left to expand the tree). As the file is quite big. ~12000 rows. 
and with possible 5 layers (so there are index numbers like 1.1.1.1.1 
to make then into different classes). I programmed in tk and ggobi, 
both are very slow as it loads the data all at once and cost about 5 
seconds just to load 2000 files. Is there an automatic way of doing 
this?

Many thanks.

___________________________________________________

Zhesi He
Computational Biology Laboratory, University of York
York YO10 5YW, U.K.
Phone:  +44-(0)1904-328279
Email:  zh107 at york.ac.uk