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    code_14_18.py (±³Àç)
  http://itsys.hansung.ac.kr/cgi-bin/onlineTest/viewpy4AI/onlinePy4AI.cgi?source=src/py/Ch14/code_14_18.py



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#
# µû¶óÇϸ砹è¿ì´Â ÆÄÀ̽ã°ú µ¥ÀÌÅÍ°úÇÐ(»ý´ÉÃâÆÇ»ç 2020)
# 14.18 k-NN ¾Ë°í¸®ÁòÀ» Àû¿ëÇغ¸ÀÚ, 388ÂÊ
#
# (80:20)À¸·Î ºÐÇÒÇÑ´Ù. 
from sklearn.datasets import load_iris 
from sklearn.model_selection import train_test_split 
 
iris = load_iris() 
X_train,X_test,y_train,y_test = train_test_split(iris.data, iris.target,
                                                test_size=0.2)
 
from sklearn.neighbors import KNeighborsClassifier 
from sklearn import metrics 
 
num_neigh = 3
knn = KNeighborsClassifier(n_neighbors = num_neigh) 
knn.fit(X_train, y_train) 
y_pred = knn.predict(X_test) 
scores = metrics.accuracy_score(y_test, y_pred) 
print('n_neighbors°¡ {0:d}À϶§ Á¤È®µµ: {1:.3f}'.format(num_neigh, scores))
cs

  µî·ÏÀÏ : 2022-12-06 [02:11] Á¶È¸ : 271 ´Ù¿î : 0   
 
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