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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}}`
44 lines
1.3 KiB
Markdown
44 lines
1.3 KiB
Markdown
---
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slug: /en/sql-reference/aggregate-functions/reference/simplelinearregression
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sidebar_position: 183
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---
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# simpleLinearRegression
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Performs simple (unidimensional) linear regression.
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``` sql
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simpleLinearRegression(x, y)
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```
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Parameters:
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- `x` — Column with explanatory variable values.
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- `y` — Column with dependent variable values.
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Returned values:
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Constants `(k, b)` of the resulting line `y = k*x + b`.
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**Examples**
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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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