如何在Python中更正超平面的位置?

问题描述 投票:1回答:1

我的代码:

import matplotlib.pyplot as plt
import numpy as np
from sklearn.linear_model import SGDRegressor

alpha_lst = [0.0001,1,100]

outlier = [(0,2),(21, 13), (-23, -15), (22,14), (23, 14)]

for i in range(len(alpha_lst)):
    plt.figure(figsize = (17,14))
    k = 0
    X= b * np.sin(phi)
    Y= a * np.cos(phi)
    for j in outlier:
        plt.subplot(3,5,k+1)
        k+=1 
        X = np.append(X,j[0]).reshape(-1,1)
        Y = np.append(Y,j[1]).reshape(-1,1)
        clf = SGDRegressor(alpha=alpha_lst[i], eta0=0.001, learning_rate='constant',random_state=0)
        clf.fit(X,Y)
        coef = clf.coef_
        intercept = clf.intercept_
        y_min = np.amin(X)
        y_max = np.amax(X)
        hyper_plane = draw_hyper_plane(coef,intercept,y_min,y_max)

        plt.scatter(X,Y,color='blue')

    plt.show()

我的绘图功能:

def draw_hyper_plane(coef,intercept,y_max,y_min):
    points=np.array([[((-coef*y_min - intercept)/coef), y_min],[((-coef*y_max - intercept)/coef), y_max]])
    plt.plot(points[:,0], points[:,1])

实际输出:“此代码段的输出”

所需输出:“所需的输出”“>

我的问题:

  • 我如何修改我的代码以获得所需的输出?

  • 离群值对超平面位置有什么影响?

  • 什么参数影响平面的位置?

我的代码:将matplotlib.pyplot导入为plt,从sklearn.linear_model导入numpy为np导入SGDRegressor alpha_lst = [0.0001,1,100]离群值= [(0,2),(21,13),(-23,-15) ,(22,14),(23,14)]表示i ...

python matplotlib linear-regression
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投票

您开始知道如何改变超平面的角度..如果可以,请向她解释

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