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ベクトルを2次元に可視化する

Last updated at Posted at 2020-09-19

##準備 - Preparation

vecs #numpyの2重配列
Name #ラベル

##主成分分析 - Principal Component Analysis

from sklearn.decomposition import PCA #主成分分析器

pca = PCA(n_components=2)
pca.fit(vecs)
x = pca.transform(vecs)

X = []
Y = []
for j in range(len(x)):
  X.append(x[j][0])
  Y.append(x[j][1])

##可視化 - Visualization

fig, ax = pyplot.subplots(figsize=(15,15))
ax.scatter(X, Y)
for i, txt in enumerate(Name):
  ax.annotate(txt, (X[i], Y[i]))
pyplot.savefig("img.png") # 保存

##例 - Example
Wikipedia2Vecの事前学習モデルから国名に対応するベクトルを抽出し,可視化した結果
Visualization of country vectors, which was extracted Wikipedia2Vec model.
img.png

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