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Data Management

Data Management. 連賢明 政大財政. 統計軟體. 一般通用 STATA SAS 個體計量 LIMDEP 高階軟體 MATLAB GAUSS. 2. STATA 優點. 容易上手 執行速度快 軟體可永久性使用 網站建構相當完整 http://www.stata.com/ http://www.ats.ucla.edu/stat/stata / 電腦記憶體要多. 3. Stat/Transfer. 將其他檔案格式轉為 STATA 資料檔 Stat/Transfer 可支援的檔案類型 Excel Limdep SAS

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Data Management

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  1. Data Management 連賢明 政大財政

  2. 統計軟體 一般通用 STATA SAS 個體計量 LIMDEP 高階軟體 MATLAB GAUSS 2

  3. STATA優點 容易上手 執行速度快 軟體可永久性使用 網站建構相當完整 http://www.stata.com/ http://www.ats.ucla.edu/stat/stata/ 電腦記憶體要多 3

  4. Stat/Transfer 將其他檔案格式轉為STATA資料檔 Stat/Transfer可支援的檔案類型 Excel Limdep SAS SPSS Many others

  5. Stat/Transfer Input File Type : 選取原始資料的檔案類型 File Specification：輸入原始資料檔的路徑 Output File Type：選取欲轉換之檔案類型 File Specification：輸入轉換後資料檔欲儲存之路徑

  6. Stat/Transfer Variables 標籤下勾選需要的變數

  7. STATA 介面 The command window：撰寫程式 The result window ：執行程式後之結果 The review window ：顯示執行過的程式 The variable window ：列出所有變數

  8. 1.1 Read the data • Read the ASCII file • infile • must provide the variable name, width, and format • Read the excel file • insheet • variable names need to be specified • Read the Stata file • use c:\regstata\elemapi • from the internet

  9. cd • dir • use • save

  10. 1.2 Describe the data • Describe the data • Data size • Observations • Variable name • Variable type (string, byte, float, etc)

  11. 直接按ok

  12. Variables • api00/academic performance of the school • acs_k3/the average class size in kindergarten through 3rd grade • meals/the percentage of students receiving free meals • full/the percentage of teachers who have full teaching credentials

  13. List • All observations • Some observations • Some variables

  14. 選取變數

  15. Notice the missing values of meals. 

  16. Codebook • Number of values • Missing values • Distribution of values

  17. 選取變數後按ok

  18. summarize • Provide concise information about variables • Observations • Basic statistics (mean, s.d., min, max) • Option: details

  19. 選取變數後按ok

  20. 1.3 Tab the data • Tabulate • Tabulate the size of class size

  21. Look at the school and district number to check if they are from the same district

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