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请问lesson1 逻辑回归里面这行代码的数学原理是什么？ #4

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wongsihan opened this issue Feb 13, 2021 · 1 comment

wongsihan commented Feb 13, 2021

plot_y = (-w0 * plot_x - plot_b) / w1

这里plot画出的是两种类别的分割线，没明白y为什么要这么取值，nn.linear的两个权重w0 w1分别有什么含义呢？

Owner

zhangxiann commented May 8, 2021

你可以反推一下：
plot_y = (-w0 * plot_x - plot_b) / w1 可以化为 w1 * plot_y + w0 * plot_x + plot_b = 0。

这就是逻辑回归的公式中的 f(x)

附上逻辑回归公式：

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