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並前往https://tree.rocks/decision-tree-graphviz-contour-with-pandas-gen-train-test-dataset-for-beginner-9137b7c8416a

資料視覺化之Decision tree (決策樹)範例與Machine Learning ...

import pandas as pd ... from sklearn.tree import DecisionTreeClassifier ... 這邊我們要透過第三方程式幫忙繪圖( https://graphviz.org )

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