原创 Supervised Classification——Logistic Regression Classification
目錄1. 理解2. 方法2.1 Hypothesis representation2.2 Cost function2.2 Gradient Descent3. 代碼參考 1. 理解 Logistic regression cla
2020-06-28 14:06:09
原创 Supervised Classification——Decision tree
目錄1. 理解2. 方法2.1 Attribute Selection Measures2.1.1 Information Gain2.1.2 Gain Ratio2.1.3 Gini Index2.2 When to stop
2020-06-23 02:47:54
原创 SQL Window Function
文章目錄1. 窗口函數2. 語法2.1 分析函數（Analytical function）2.2 PARTITION BY & ORDER BY2.4 ROWS3. 用法舉例3.1 GROUP BY vs OVER(PARTITI
2020-06-15 14:31:41
原创 Git and GItLab
文章目錄Install Git On your LattopSet Up a GitSet Up GitLab1. Set up SSH key(Git)2. Set up SSH key(GitLab)Create a Proj
2020-06-15 14:31:31
原创 1.Read/Write file
Content1. Text file2. CSV file3. Other types of files 1. Text file f = open(file, mode) mode explanation r d
2020-06-15 14:31:31
原创 Supervised classification——KNN
目錄1. 理解2. 方法3. 代碼參考 1. 理解 KNN(K-Nearest Neighbours)是一種比較簡單的有監督分類算法。有監督的意思是對於每個數據實體，都有一個標籤，在分類的時候我們會使用到這個標籤。簡單來說，對一個
2020-06-15 14:31:31
原创 Data operations
Content1. Indexing and selecting data1.1 Section by label1.2 Section by position1.3 Section by callable1.4 Columns
2020-06-15 14:31:31
原创 SQL(View && trigger &&Procedure)
Content1. View2. Stored Procedures3. TriggerReference 1. View A view does not physically store the data. When you i
2020-06-15 14:31:31