2020年8月31日
[Prostgres] Select Grouped and Aggregated Data with SQL
摘要： Another powerful SQL skill is understanding how to group rows together by column values. Once the data is grouped together, it can be difficult to und 阅读全文
posted @ 2020-08-31 23:53 Zhentiw 阅读(126) 评论(0) 推荐(0)
[Machine Learning] Regularization Ex
摘要： If lamda is large then theta should be small in order to minize the cost function. Too large lamda, cause underfitting the data. 阅读全文
posted @ 2020-08-31 02:10 Zhentiw 阅读(127) 评论(0) 推荐(0)
[Machine Learning] Solve overfitting, Regularization
摘要： If we have overfitting from our hypothesis function, we can reduce the weight that some of the terms in our function carry by increasing their cost. S 阅读全文
posted @ 2020-08-31 01:48 Zhentiw 阅读(206) 评论(0) 推荐(0)
[Machine Learning] Logistic Regression Ex
摘要： 阅读全文
posted @ 2020-08-31 01:33 Zhentiw 阅读(87) 评论(0) 推荐(0)