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For a Proxy, function signature looks like: const target = {} const handler = { get(target, propKey) { return Reflect.get(target, propKey) } } const p 阅读全文
posted @ 2020-08-27 02:46
Zhentiw
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We cannot use the same cost function that we use for linear regression because the Logistic Function will cause the output to be wavy, causing many lo 阅读全文
posted @ 2020-08-26 15:52
Zhentiw
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You can have a Box element, which just used for create other element or layout: // example Box.js import styled from 'styled-components' import { spac 阅读全文
posted @ 2020-08-25 01:55
Zhentiw
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In previous post: https://www.cnblogs.com/Answer1215/p/13527076.html Code: .banner { display: grid; grid-template-columns: 2fr 1fr 1fr; grid-template- 阅读全文
posted @ 2020-08-24 15:12
Zhentiw
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x2: midterm exam ^ 2, apply mean normalization: mean value = (7921 + 5184 + 8836 +4761) / 4 = 6675.5 range = 8836-4761 = 4075 ans = (4761 - 6675./5) / 阅读全文
posted @ 2020-08-24 02:05
Zhentiw
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posted @ 2020-08-24 01:29
Zhentiw
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We have used gradient descent where in order to minimize the cost function J(theta), we would take this iterative algorithm that takes many steps, mul 阅读全文
posted @ 2020-08-24 01:20
Zhentiw
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In this lesson we’ll improve a generic button primitive component by refactoring it with Styled System to simplify the implementation. The naïve style 阅读全文
posted @ 2020-08-23 03:02
Zhentiw
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Quadratic function: Cubic function: 阅读全文
posted @ 2020-08-22 16:50
Zhentiw
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Feature scaling: it make gradient descent run much faster and converge in a lot fewer other iterations. Bad cases: Good cases: We can speed up gradien 阅读全文
posted @ 2020-08-22 16:33
Zhentiw
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