函数说明:计算平方误差 Parameters: yArr - 预测值 yHatArr - 真实值 Returns: Website: http://www.cuijiahua.com/ Modify: 2017-12-03
(yArr,yHatArr)
| 124 | return inxMat, inyMat |
| 125 | |
| 126 | def rssError(yArr,yHatArr): |
| 127 | """ |
| 128 | 函数说明:计算平方误差 |
| 129 | Parameters: |
| 130 | yArr - 预测值 |
| 131 | yHatArr - 真实值 |
| 132 | Returns: |
| 133 | |
| 134 | Website: |
| 135 | http://www.cuijiahua.com/ |
| 136 | Modify: |
| 137 | 2017-12-03 |
| 138 | """ |
| 139 | return ((yArr-yHatArr)**2).sum() |
| 140 | |
| 141 | def stageWise(xArr, yArr, eps = 0.01, numIt = 100): |
| 142 | """ |