429页 #140
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要去两次均值吗 |
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谢谢你，21.13是先计算z分数，再求协方差，相当于求原始数据相关性系数。
第二个问题没明白。
…On Sun, Oct 1, 2023 at 9:11 AM ssx12345 ***@***.***> wrote:
要去两次均值吗
[image: IMG_20231001_211009_edit_282612201389167]
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你看，我把21.13带进去是不是减了两边u1和u2
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主题: Re: [Visualize-ML/Book3_Elements-of-Mathematics] 429页 (Issue #140)
谢谢你，21.13是先计算z分数，再求协方差，相当于求原始数据相关性系数。
第二个问题没明白。
On Sun, Oct 1, 2023 at 9:11 AM ssx12345 ***@***.***> wrote:
> 要去两次均值吗
> [image: IMG_20231001_211009_edit_282612201389167]
> <https://user-images.githubusercontent.com/117281288/271830216-741d08b8-7fba-4b5d-97e9-d823966f0052.jpg>
>
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你看，我把21.13带进去是不是减了两边u1和u2 |
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21.13是在求相关性系数
…On Sun, Oct 1, 2023 at 11:12 AM ssx12345 ***@***.***> wrote:
你看，我把21.13带进去是不是减了两边u1和u2
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画圈的两个地方是不是应该去掉呀
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