回归的矩阵表达形式
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| 回归的矩阵表达形式 [2023/04/10 10:53] – yunyuqu | 回归的矩阵表达形式 [2024/04/14 03:41] (当前版本) – zwz | ||
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| ====回归的矩阵表达形式==== | ====回归的矩阵表达形式==== | ||
| + | ==== The matrix expression of the regression ==== | ||
| + | |||
| *** 1.公式** | *** 1.公式** | ||
| * {{: | * {{: | ||
| 行 10: | 行 12: | ||
| * (2)当 k = n 时,矩阵Y乘以矩阵X才是可行的,结果矩阵YX才存在。 | * (2)当 k = n 时,矩阵Y乘以矩阵X才是可行的,结果矩阵YX才存在。 | ||
| * 公式: | * 公式: | ||
| - | * {{: | + | * {{: |
| + | * | ||
| * **转置**:对应的行列互换。 | * **转置**:对应的行列互换。 | ||
| + | |||
| + | ---- | ||
| + | *** 1.Formulas** | ||
| + | * {{: | ||
| + | |||
| + | ---- | ||
| + | *** 2.Review of matrix operations** | ||
| + | * **Addition and subtraction**:Add or subtract the values of the corresponding row and column coordinates | ||
| + | * **Subtraction**:Suppose that there are matrices X with dimensions n × m, and matrices Y with dimensions l × k, then | ||
| + | * (1)Only when m = l is it feasible to multiply matrix X by matrix Y, and the resultant matrix XY exists; | ||
| + | * (2)Only when k = n is it feasible to multiply matrix Y by matrix X, and the resultant matrix YX exists. | ||
| + | * Formulas: | ||
| + | * {{: | ||
| + | * | ||
| + | * **Matrix transposition**:Interchange of corresponding rows and columns. | ||
回归的矩阵表达形式.1681124015.txt.gz · 最后更改: 2023/04/10 10:53 由 yunyuqu