Poli 5D Social Science Data Analytics Functions in Excel (2); Intro to Stata

Transcription

1 Poli 5D Social Science Data Analytics Functions in Excel (2); Intro to Stata Shane Xinyang Xuan ShaneXuan.com January 25, 2017 ShaneXuan.com 1 / 14

2 Contact Information Shane Xinyang Xuan The teaching sta is a team! Professor Roberts M (SSB 299) Jason Bigenho Th (Econ 116) Shane Xuan Th (SSB 332) Supplemental Materials UCLA STATA starter kit Princeton data analysis ShaneXuan.com 2 / 14

3 Road map Here is what we are going to cover in today s section: Logical functions in Excel Nested IF functions in Excel Macros in Excel Introduction to Stata ShaneXuan.com 3 / 14

4 Road map Here is what we are going to cover in today s section: Logical functions in Excel Nested IF functions in Excel Macros in Excel Introduction to Stata Let s take a poll really quick in which order do you want me to cover these topics in today s section? ShaneXuan.com 3 / 14

5 Road map Here is what we are going to cover in today s section: Logical functions in Excel Nested IF functions in Excel Macros in Excel Introduction to Stata Let s take a poll really quick in which order do you want me to cover these topics in today s section? Should I slow down in the section? ShaneXuan.com 3 / 14

6 Road map Here is what we are going to cover in today s section: Logical functions in Excel Nested IF functions in Excel Macros in Excel Introduction to Stata Let s take a poll really quick in which order do you want me to cover these topics in today s section? Should I slow down in the section? Any questions that I can answer (w.r.t lectures, sections, homework,...)? ShaneXuan.com 3 / 14

7 Logical functions We are going to go through four examples in the next few slides to wrap up logical functions. ShaneXuan.com 4 / 14

8 Logical functions ShaneXuan.com 4 / 14

9 Logical functions ShaneXuan.com 4 / 14

10 Logical functions ShaneXuan.com 4 / 14

11 Logical functions ShaneXuan.com 4 / 14

12 Nested IF Scenario: You want to test for multiple outcomes. Solution: A nested IF function is when one IF function is placed inside another IF function to test an additional condition. ShaneXuan.com 5 / 14

13 Macros in Excel Scenario: Wewanttoperformrepetitivetasksconsistently Solution: Use macros! I You record a macro I You then apply the macro to other cells ShaneXuan.com 6 / 14

14 Macros in Excel Record Macro ShaneXuan.com 6 / 14

15 Macros in Excel Stop Recording ShaneXuan.com 6 / 14

16 Macros in Excel In a new worksheet, apply Macros ShaneXuan.com 6 / 14

17 Macros in Excel What s under the hood? ShaneXuan.com 6 / 14

18 We are done with Excel! We are done with Excel! What to do next? I Check out VBA if you want know more about Excel I We are going to move on to Stata and R for the rest of the quarter ShaneXuan.com 7 / 14

19 Introduction to Stata I Change CD (cd /Users/Shane/Dropbox/Poli5D/psets/ ) I Import data I Summarize variable I IF statement in Stata I Lookup function in Stata I Help command I Sort command I Create.log files ShaneXuan.com 8 / 14

20 Import data in Stata ShaneXuan.com 9 / 14

21 Import data in Stata Example: import excel h1 fams data.xlsx, sheet( Families ) firstrow clear ShaneXuan.com 9 / 14

22 Import data in Stata Example: import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I import data ShaneXuan.com 9 / 14

23 Import data in Stata Example: import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I specify sheet name ShaneXuan.com 9 / 14

24 Import data in Stata Example: import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I Make the first row to be variable names ShaneXuan.com 9 / 14

25 Import data in Stata Your data look like: ShaneXuan.com 9 / 14

26 Summarize variables in Stata Example: ShaneXuan.com 10 / 14

27 Summarize variables in Stata Example: ShaneXuan.com 10 / 14

28 Summarize variables in Stata Example: ShaneXuan.com 10 / 14

29 IF statements in Stata Example: Syntax: I Count if (variable == value) I Other operations:!= > < <= >= Note: In Stata, the single equal (=) isusedasasetequal operator; the double equals (==) is used to test for equality; exclamation mark (!) means NOT ShaneXuan.com 11 / 14

30 IF statements in Stata Example: Note: InStata,& means AND, and means OR ShaneXuan.com 11 / 14

31 IF statements in Stata Example: Note: In Stata, the single equal (=) isusedasasetequal operator; the double equals (==) is used to test for equality ShaneXuan.com 11 / 14

32 Others I Lookup function: list if (variable) == (value) I Help command: help tabulate I Sort command: sort (variable) I.log file: log using log example, text clear more. (your code here) log close ShaneXuan.com 12 / 14

33 Save your.do file! ShaneXuan.com 13 / 14