Poli 5D Social Science Data Analytics More on Stata
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1 Poli 5D Social Science Data Analytics More on Stata Shane Xinyang Xuan ShaneXuan.com February 1, 2017 ShaneXuan.com 1 / 12
2 Contact Information Shane Xinyang Xuan The teaching sta is a team! Professor Roberts M (SSB 299) Jason Bigenho Th (Econ 116) Shane Xuan M (SSB 332) TH (SSB 332) Supplemental Materials UCLA STATA starter kit Princeton data analysis ShaneXuan.com 2 / 12
3 Road map Some quick notes before we start today s section: Make sure that you pass around the attendance sheet Open a.do file Import your data ( h1 fams data.xlsx ) I will be using my slides, and you will need to type the code in your.do file ShaneXuan.com 3 / 12
4 Announcement I have changed my o ce hours to I Monday 11-11:50 am I Thursday 12-12:50 pm in order to accommodate as many students as possible. ShaneXuan.com 4 / 12
5 Data management I You should have the data imported before the section starts: cd /Users/Shane/Dropbox/Poli5D/psets/ import excel h1 fams data.xlsx, sheet( Families ) firstrow clear ShaneXuan.com 5 / 12
6 Data management I You should have the data imported before the section starts: cd /Users/Shane/Dropbox/Poli5D/psets/ import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I We want to generate a new variable (age dad2) ShaneXuan.com 5 / 12
7 Data management I You should have the data imported before the section starts: cd /Users/Shane/Dropbox/Poli5D/psets/ import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I We want to generate a new variable (age dad2) generate age dad2 = age dad + 1 ShaneXuan.com 5 / 12
8 Data management I You should have the data imported before the section starts: cd /Users/Shane/Dropbox/Poli5D/psets/ import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I We want to generate a new variable (age dad2) generate age dad2 = age dad + 1 I We want to replace a value in variable race mom ShaneXuan.com 5 / 12
9 Data management I You should have the data imported before the section starts: cd /Users/Shane/Dropbox/Poli5D/psets/ import excel h1 fams data.xlsx, sheet( Families ) firstrow clear I We want to generate a new variable (age dad2) generate age dad2 = age dad + 1 I We want to replace a value in variable race mom replace race mom = Black if race mom == Blck ShaneXuan.com 5 / 12
10 Label your variables I Create a mapping (mom older names) ShaneXuan.com 6 / 12
11 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No ShaneXuan.com 6 / 12
12 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable ShaneXuan.com 6 / 12
13 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable label values mom older mom older names ShaneXuan.com 6 / 12
14 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable label values mom older mom older names I Assign label ShaneXuan.com 6 / 12
15 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable label values mom older mom older names I Assign label label variable mom older Whether mom is older ShaneXuan.com 6 / 12
16 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable label values mom older mom older names I Assign label label variable mom older Whether mom is older I Tabulate your results ShaneXuan.com 6 / 12
17 Label your variables I Create a mapping (mom older names) label define mom older names 1 Yes 0 No I Associate the mapping with a variable label values mom older mom older names I Assign label label variable mom older Whether mom is older I Tabulate your results tab mom older ShaneXuan.com 6 / 12
18 Deal with missingness I Generate missing ShaneXuan.com 7 / 12
19 Deal with missingness I Generate missing generate dadmiss = missing(age dad) ShaneXuan.com 7 / 12
20 Deal with missingness I Generate missing generate dadmiss = missing(age dad) I Tabulate your results ShaneXuan.com 7 / 12
21 Deal with missingness I Generate missing generate dadmiss = missing(age dad) I Tabulate your results tab dadmiss ShaneXuan.com 7 / 12
22 Deal with missingness I Generate missing generate dadmiss = missing(age dad) I Tabulate your results tab dadmiss I lookup functions ShaneXuan.com 7 / 12
23 Deal with missingness I Generate missing generate dadmiss = missing(age dad) I Tabulate your results tab dadmiss I lookup functions list if dadmiss == 1 ShaneXuan.com 7 / 12
24 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions ShaneXuan.com 8 / 12
25 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) ShaneXuan.com 8 / 12
26 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping ShaneXuan.com 8 / 12
27 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping label define agenames 1 young 2 middle 3 older ShaneXuan.com 8 / 12
28 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping label define agenames 1 young 2 middle 3 older I Apply the mapping ShaneXuan.com 8 / 12
29 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping label define agenames 1 young 2 middle 3 older I Apply the mapping label values age dad3 agenames ShaneXuan.com 8 / 12
30 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping label define agenames 1 young 2 middle 3 older I Apply the mapping label values age dad3 agenames I Tabulate results, calculate by row ShaneXuan.com 8 / 12
31 Create some bins Scenario: Wewanttorecode interval variables into ordinal variables. I recode functions recode age dad (15/25=1) (26/35=2) (36/55=3), gen(age dad3) I Create a mapping label define agenames 1 young 2 middle 3 older I Apply the mapping label values age dad3 agenames I Tabulate results, calculate by row tab age dad3 welfare, row ShaneXuan.com 8 / 12
32 Visualization in Stata I Histogram histogram age mom histogram age mom, frequency histogram age mom, percent ShaneXuan.com 9 / 12
33 Visualization in Stata I Histogram histogram age mom histogram age mom, frequency histogram age mom, percent I Scatterplot twoway (scatter age mom age dad, mlabel(idnum) mlabsize(tiny) msize(tiny)) ShaneXuan.com 9 / 12
34 Visualization in Stata (2) I Boxplot ShaneXuan.com 10 / 12
35 Visualization in Stata (2) I Boxplot graph box age mom ShaneXuan.com 10 / 12
36 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) ShaneXuan.com 10 / 12
37 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot ShaneXuan.com 10 / 12
38 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable ShaneXuan.com 10 / 12
39 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable encode race mom, generate(race mom2) ShaneXuan.com 10 / 12
40 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable encode race mom, generate(race mom2) I install -catplot- ShaneXuan.com 10 / 12
41 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable encode race mom, generate(race mom2) I install -catplotssc inst catplot ShaneXuan.com 10 / 12
42 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable encode race mom, generate(race mom2) I install -catplotssc inst catplot I Plot ShaneXuan.com 10 / 12
43 Visualization in Stata (2) I Boxplot graph box age mom graph box age mom, scheme(s1manual) I Barplot I Code race mom into numeric variable encode race mom, generate(race mom2) I install -catplotssc inst catplot I Plot catplot race mom2 ShaneXuan.com 10 / 12
44 Visualization in Stata (3) Histogram across units ShaneXuan.com 11 / 12
45 Visualization in Stata (3) Histogram across units I histogram age mom if race mom== Black ShaneXuan.com 11 / 12
46 Visualization in Stata (3) Histogram across units I histogram age mom if race mom== Black I histogram age mom if race mom== White ShaneXuan.com 11 / 12
47 Visualization in Stata (3) Histogram across units I histogram age mom if race mom== Black I histogram age mom if race mom== White I histogram age mom, by(race mom) ShaneXuan.com 11 / 12
48 Visualization in Stata (3) Histogram across units I histogram age mom if race mom== Black I histogram age mom if race mom== White I histogram age mom, by(race mom) ShaneXuan.com 11 / 12
49 Midterm Review Please ask questions. ShaneXuan.com 12 / 12
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