pydot.InvocationException: GraphViz's executables not found

Question

I try to run this example for decision tree learning, but get the following error message:

File \"coco.py\", line 18, in graph.write_pdf(\"iris.pdf

Answer 1

I did face similar issue and the way it was corrected was by changing the path.

This is what I did :

Copy paste "graphiz" path from your computer to Environment variable>Path from the control panel

Example: Graphiz path : C:\Apps\Program Files\Continuum\Anaconda2\Library\bin\graphviz)

(I had installed it on Apps folder. It could be in a diff path for you)

Setting path in Environment Variable :

Go to Control Panel>Control Panel\System and Security\System .Click Advanced Setting and then Advanced .You'll find Environment variables at bottom right. Click Path to edit and save it . Close your IDE and re open it .

It worked for me .