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33 lines (20 loc) · 801 Bytes
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# https://www.youtube.com/watch?v=84gqSbLcBFE&list=PLT6elRN3Aer7ncFlaCz8Zz-4B5cnsrOMt&index=5
from sklearn import datasets
iris = datasets.load_iris()
X = iris.data
y = iris.target
from sklearn.cross_validation import train_test_split
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=.5)
from sklearn import tree
my_classifier = tree.DecisionTreeClassifier()
my_classifier.fit(X_train, y_train)
predictions = my_classifier.predict(X_test)
from sklearn.metrics import accuracy_score
print(accuracy_score(y_test, predictions))
#####
# try with KNeighbors
from sklearn.neighbors import KNeighborsClassifier
n_classifier = KNeighborsClassifier()
n_classifier.fit(X_train, y_train)
n_predictions = n_classifier.predict(X_test)
print(accuracy_score(y_test, n_predictions))