[scikit-learn] Issue with DecisionTreeClassifier

[Nelson Liu]

Hi,
Yes, it's estimator.tree_.impurity

Nelson

On Mon, Aug 29, 2016, 09:18 Ibrahim Dalal via scikit-learn <
scikit-learn at 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 at 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 at 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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>>
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