【机器学习】监督学习--（分类）非线性逻辑回归

注：数据集放在文章末尾

（1）非线性逻辑回归 —— 梯度下降法

import matplotlib.pyplot as plt
import numpy as np
from sklearn.metrics import classification_report
from sklearn import preprocessing
from sklearn.preprocessing import PolynomialFeatures
# 数据是否需要标准化
scale = False

# 载入数据
data = np.genfromtxt("LR-testSet2.txt", delimiter