sklearn.cluster.KMeans.basic

 

from sklearn.datasets import make_blobs

X,y=make_blobs()
for i in range(3):
    print((y==i).sum())

'''
34
33
33
'''

 

plt.scatter(X[:,0],X[:,1],c=y)
plt.colorbar()

from sklearn.cluster import KMeans
model=KMeans(n_clusters=3) # n_clusters : 중점 갯수
model.fit(X) # X만 넣는다!
model.cluster_centers_
plt.scatter(X[:,0],X[:,1],c=model.labels_)

# 중심점 마크
plt.scatter(model.cluster_centers_[:,0],model.cluster_centers_[:,1],marker='*',c='r',s=300)

# 영역 표시
mglearn.plots.plot_2d_classification(model,X,alpha=0.3)

from sklearn.cluster import KMeans
model=KMeans(3)
model.fit(X) # X만 넣는다!
model.cluster_centers_
plt.scatter(X[:,0],X[:,1],c=model.labels_)
plt.scatter(model.cluster_centers_[:,0],model.cluster_centers_[:,1],marker='*',c='r',s=300)
mglearn.plots.plot_2d_classification(model,X,alpha=0.3)

display(model.transform(X),model.predict(X))# transform : 중심점 까지의 거리

'''
array([[13.1395785 ,  0.24441747, 12.93107807],
       [ 1.24476312, 11.8946356 ,  3.64065633],
       [ 3.93281954, 14.27283331,  1.85963563],
       [ 0.86826948, 13.79232761,  4.78691746],
       [12.19839786,  0.79179981, 11.900444  ],
       [ 0.85032111, 12.09127817,  4.43272814],
       [ 0.74801688, 12.22610181,  4.06763823],
       [ 1.53987261, 13.74024499,  5.90971491],
       [13.55726898,  0.66143542, 13.21203988],
       [ 5.77892447, 13.28118039,  1.40254065],
       [ 1.47445946, 12.31750781,  5.616153  ],
       [14.11663652,  1.73626965, 13.39914618],
       [ 3.20976975, 13.02395216,  1.30082577],
       [ 0.94099476, 13.54543164,  3.90769078],
       [13.4451396 ,  0.57216951, 13.09297854],
       [ 0.67047812, 13.19370096,  5.07727131],
       [13.53754998,  1.10875141, 12.95517197],
       [11.93795783,  0.99842198, 11.79851714],
       [ 4.70331488, 12.44912832,  0.39841944],
       [ 1.3479096 , 13.02760796,  3.12355376],
       [ 3.97848245, 13.64733134,  1.16059489],
       [ 4.15068695, 13.75765789,  1.18719323],
       [13.26302325,  0.52100224, 12.86994648],
       [ 0.15451023, 12.78702005,  4.32888415],
       [ 3.68763911, 12.07403621,  0.94421051],
       [14.15076162,  1.22009214, 13.83573113],
       [ 4.3333709 , 11.51342929,  1.18289806],
       [ 0.88988607, 13.81600123,  4.60344751],
       [ 5.14994398, 14.06658039,  1.42798557],
       [13.9113235 ,  2.32161228, 12.92572567],
       [ 4.66736322, 12.46363295,  0.36002921],
       [14.05700621,  1.60188962, 14.12619927],
       [12.9199164 ,  1.1753674 , 12.28117506],
       [ 0.90854529, 13.77556526,  4.99430253],
       [ 1.83153184, 11.29316936,  3.59907177],
       [ 0.6615936 , 13.24934434,  5.05674802],
       [ 1.38165953, 12.29503611,  3.12050121],
       [ 4.61391825, 12.83203901,  0.23027138],
       [11.11241297,  2.8396683 , 11.77459475],
       [14.72109328,  2.40651955, 14.89871097],
       [12.11159098,  0.90270088, 11.79165815],
       [ 5.99160213, 12.58299041,  1.6150798 ],
       [ 5.89087643, 14.11377325,  1.8188432 ],
       [ 1.33388704, 12.40306401,  5.51414892],
       [ 0.78486691, 12.48257482,  3.70586598],
       [ 0.18456153, 13.03820309,  4.58496794],
       [11.54693593,  1.79126194, 11.80148513],
       [11.09300502,  2.11633968, 11.35780657],
       [14.7761337 ,  2.00983522, 14.69435716],
       [11.68683332,  2.61151872, 10.70633694],
       [ 4.15943242, 13.6192585 ,  1.03750557],
       [ 0.88972509, 12.19103031,  3.82909591],
       [14.05991018,  1.33324837, 13.52752267],
       [ 1.13983308, 13.69524774,  3.84115446],
       [ 2.76419683, 13.67903287,  2.15266044],
       [ 0.89790728, 12.99001059,  5.29727624],
       [ 5.78066765, 11.43123287,  1.89543155],
       [ 4.81852882, 12.64152206,  0.41747657],
       [ 3.83185437, 11.66145239,  1.19796087],
       [ 4.69465912, 13.78944714,  1.09784143],
       [ 4.53983004, 12.54507917,  0.20472964],
       [ 1.11694924, 12.63798096,  5.40512231],
       [13.06638496,  1.19678034, 12.41651431],
       [11.46851705,  1.48999754, 11.22466301],
       [ 5.54233717, 10.56527755,  2.35016202],
       [ 3.96840212, 13.25040358,  0.78360653],
       [ 1.72411522, 14.654542  ,  5.04410753],
       [13.08196779,  0.41397642, 12.70377997],
       [12.87111589,  0.7330359 , 12.8826692 ],
       [ 3.61864591, 11.6126529 ,  1.37238614],
       [ 5.6672612 , 13.13670337,  1.27176044],
       [ 5.1905471 , 12.36631896,  0.87897729],
       [ 0.62858682, 12.3343187 ,  4.51107188],
       [12.6698218 ,  0.68680746, 12.66293779],
       [ 0.90775632, 13.39746586,  5.29117099],
       [ 4.08231986, 12.73098145,  0.34022922],
       [ 0.20041788, 13.07890629,  4.31748158],
       [ 5.76242501, 13.36840992,  1.40807559],
       [13.24183605,  0.67371841, 13.18448298],
       [ 4.25882432, 12.40013298,  0.31984422],
       [ 1.07139782, 13.76437708,  5.31199797],
       [13.62340461,  0.97704267, 13.11671375],
       [ 1.35333277, 13.48520093,  3.3849091 ],
       [ 1.75391502, 11.17925548,  4.44708414],
       [ 5.41291423,  9.88460312,  2.86848477],
       [ 1.42184382, 13.24952709,  3.15210546],
       [14.04358536,  1.11493787, 13.71988018],
       [ 4.28020524, 12.25431867,  0.44984284],
       [11.52137966,  1.40991869, 11.38518227],
       [ 1.3868576 , 13.96530555,  3.88986284],
       [ 0.5420255 , 13.1615625 ,  4.94650441],
       [12.48183821,  0.48624983, 12.20597743],
       [ 3.1319276 , 12.16125857,  1.38526929],
       [ 2.8592216 , 11.5774871 ,  2.02427048],
       [11.0055059 ,  2.27557361, 11.33704986],
       [13.34032066,  0.70881503, 13.27045229],
       [13.69416599,  1.48016393, 13.82848457],
       [13.48443459,  0.56385386, 13.17785174],
       [ 5.51843645, 15.13015331,  2.45122629],
       [ 0.88101971, 12.770994  ,  5.22333595]])
array([1, 0, 2, 0, 1, 0, 0, 0, 1, 2, 0, 1, 2, 0, 1, 0, 1, 1, 2, 0, 2, 2,
       1, 0, 2, 1, 2, 0, 2, 1, 2, 1, 1, 0, 0, 0, 0, 2, 1, 1, 1, 2, 2, 0,
       0, 0, 1, 1, 1, 1, 2, 0, 1, 0, 2, 0, 2, 2, 2, 2, 2, 0, 1, 1, 2, 2,
       0, 1, 1, 2, 2, 2, 0, 1, 0, 2, 0, 2, 1, 2, 0, 1, 0, 0, 2, 0, 1, 2,
       1, 0, 0, 1, 2, 2, 1, 1, 1, 1, 2, 0])
       
'''