Hi, 

Yes, it's estimator.tree_.impurity

Nelson

On Mon, Aug 29, 2016, 09:18 Ibrahim Dalal via scikit-learn <scikit-learn@python.org> wrote:

Hi,

Is there a way to extract impurity value of a node in DecisionTreeClassifier? I am able to get this value in graph (using export_grapgviz), but can't figure out how to get this value in my code. Is there any attribute similar to estimator.tree_.children_left?

Thanks

On Mon, Aug 29, 2016 at 12:53 AM, Nelson Liu <nfliu@uw.edu> wrote:

That should be:

node indicator = estimator.tree_.decision_path(X_test)

PR welcome :) 

On Sun, Aug 28, 2016, 13:12 Ibrahim Dalal via scikit-learn <scikit-learn@python.org> wrote:

Dear Developers,

DecisionTreeClassifier.decision_path() as used here http://scikit-learn.org/dev/auto_examples/tree/unveil_tree_structure.html is giving the following error:

AttributeError: 'DecisionTreeClassifier' object has no attribute 'decision_path'

Kindly help.

Thanks

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