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677f296214
Function uses `k` internally.
E.g.
```sql
SELECT arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [0, 1, 2, 3]) FORMAT JsonEachRow
```
outputs `{"arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [0, 1, 2, 3])":{"k":1,"b":0}}`
46 lines
1.3 KiB
Markdown
46 lines
1.3 KiB
Markdown
---
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slug: /zh/sql-reference/aggregate-functions/reference/simplelinearregression
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sidebar_position: 220
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---
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# simpleLinearRegression {#simplelinearregression}
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执行简单（一维）线性回归。
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**语法**
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``` sql
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simpleLinearRegression(x, y)
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```
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**参数**
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- `x` — x轴。
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- `y` — y轴。
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**返回值**
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符合`y = k*x + b`的常量 `(k, b)` 。
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**示例**
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``` sql
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SELECT arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [0, 1, 2, 3])
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```
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``` text
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┌─arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [0, 1, 2, 3])─┐
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│ (1,0) │
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└───────────────────────────────────────────────────────────────────┘
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```
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``` sql
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SELECT arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [3, 4, 5, 6])
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```
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``` text
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┌─arrayReduce('simpleLinearRegression', [0, 1, 2, 3], [3, 4, 5, 6])─┐
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│ (1,3) │
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└───────────────────────────────────────────────────────────────────┘
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```
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