Tool for displaying binary decision tree

Answer 1

Have you looked at Graphviz ? There are some language bindings for .Net (see resources), and it can output in a variety of formats (so you can view using SVG/HTML/Flex, standalone viewers etc.)

Answer 2

I stumbled upon a WPF based package on CodeProject:

A Graph Tree Drawing Control for WPF

Looks simplistic enough and should cover my needs. Any comments on this?

Answer 3

The selected answer recommends graphviz though the comments below this answer mention that graphviz is not easy to use for the purpose recited in the question. I actually use graphviz for this purpose--as a library (via python bindings supplied by pygraphviz) for plotting the output (i.e., the structure created by running the C4.5 algorithm against a training set). Setting the graph type as a directed graph ('digraph' is the formal syntax), graphviz' SMACOF algorithm gives you a nice tree structure right out of the box.

For instance:

To create the graph below, i kept the default values for all of the 'graph' parameters that affect layout (e.g., nodesep, ranksep, ratio), with the exception of 'orientation', which i set to 'landscape' (default is 'portraint').