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# 生成测试数据,训练样本 | |
X_train, y = make_blobs(n_samples = 1000, centers =2, n_features=2, random_state = 2) | |
# StandardScaler()以及fit_transfrom函数的作用需要解释一下 | |
scaler = StandardScaler() #数据预处理,使得经过处理的数据符合正态分布,即均值为0,标准差为1 | |
X_train_scaled = scaler.fit_transform(X_train, y) | |
y[y == 0] = -1 | |
# 将训练数据绘制出来 | |
fig, ax = plt.subplots() | |
ax.scatter(X_train_scaled[:, 0], X_train_scaled[:, 1], | |
c=y, cmap=plt.cm.viridis, lw=0, alpha =0.25) | |
plt.show() |
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