Binary decision tree display tool
I am currently working on creating binary decision trees. Many of them. Some of them are stored in XML format, so you can parse them manually if needed.
The tree structure is mostly nested with <NODE> tags. Each node can also have multiple child tags that define the properties of the node.
What I would like to do is display the trees graphically. Vertically or horizontally doesn't matter, but I would like to use a geometrically tree-like layout for example. eg:
... not the layout commonly used in file system browsers, which is not the best way to display binary trees.
Is there a .NET library or alternatively a standalone tool that does this well?
source to share
GraphViz
The selected answer also recommends graphviz, but does not provide a displayed example; what else the notes below this answer mentions that graphviz is not easy to use for the purpose stated in the question.
I disagree. I am actually using graphviz for this purpose - as a library (via the python bindings provided by pygraphviz) for plotting the output (i.e. the Structure created when running the C4.5 algorithm against the training set). Setting the graph type to a directed graph (digraph is a formal syntax), the graphviz 'SMACOF algorithm gives you a nice tree structure right out of the box.
For example:
alt text http://img205.imageshack.us/img205/9290/btreeingraphviz.png
To create the graph below, I kept the default values for all the "graph" parameters that affect the layout (eg nodeep, ranksep, ratio), except for the "orientation" which I set to "landscape" (the default is " portraits ").
source to share