2z

h2

h4

link to 22z

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a link to apple.com

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local image

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web image

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    using namespace std;
    for(int i = 0;i < 100 ;i ++)
    cout<<i<<endl;

    import torch
    import numpy as np
    import matplotlib.pyplot as plt

    x_data = [1.0, 2.0, 3.0]
    y_data = [2.0, 4.0, 6.0]

    def forward(x):
        return x * w

    def loss(x, y):
        y_pred = forward(x);
        return (y_pred - y) * (y_pred - y)

    w_list = []
    mse_list = []

    for w in np.arange(0.0, 4.1, 0.1):
        print('w = ',w)
        l_sum = 0
        for x_val,y_val in zip(x_data, y_data):
            y_pred_val = forward(x_val)
            loss_val = loss(x_val, y_val)
            l_sum += loss_val
            print('\t',x_val, y_val, y_pred_val, loss_val)
        print('MSE = ',l_sum / 3)
        w_list.append(w)
        mse_list.append(l_sum / 3)

        #绘图
        plt.plot(w_list, mse_list)
        plt.ylabel('Loss')
        plt.xlabel('w')
        plt.show()

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a block quote

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1. 123
2. 456
3. 789
4. 987

• first
• second
• third

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head1	head2	head3
content1	content2	content3
content	content	content

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bold text

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italicized text

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cu xie ti

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delete

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