UNIVERSIT DU QUBEC MONTRAL - Laboratoire d'études de la ...

7.3 Répéter des instructions
L’instruction for peut être utilisée pour répéter une instruction selon une liste de
variables, une logique numérique ou des mots.
for varlist varlist : commands_involving_X
for newlist newvarlist: commands_involving_X
for numlist numlist: commands_involving_X
for anylist wordlist: commands_involving_X
Des exemples permettront de comprendre.
for varlist earng42 ecage26 ecsex99: sum X
-> sum earng42
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
earng42 | 56216 21708.29 30166.52 -65000 835500
-> sum ecage26
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
ecage26 | 56216 45.14199 17.90092 16 80
-> sum ecsex99
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
ecsex99 | 56216 1.523143 .4994686 1 2
clear
set mem 300m
use "edtr2002 personnes.dta"
tab pvreg25, g(prov)
for newlist v1-v10: g X = proX
keep v1-v10
-> g v1 = prov1
-> g v2 = prov2
-> g v3 = prov3
-> g v4 = prov4
-> g v5 = prov5
-> g v6 = prov6
-> g v7 = prov7
-> g v8 = prov8
-> g v9 = prov9
-> g v10 = prov10
for numlist 1/11: rename provX stateX
-> rename prov1 state1
-> rename prov2 state2
-> rename prov3 state3
-> rename prov4 state4
-> rename prov5 state5
-> rename prov6 state6
-> rename prov7 state7
-> rename prov8 state8
-> rename prov9 state9
-> rename prov10 state10
-> rename prov11 state11
clear
set mem 300m
use "edtr2002 personnes.dta"
label define mf 1 "male" 2 "female"
label values ecsex99 mf
keep if ecsex99 summarize earng42 if gender=="male"
Variable | Obs Mean Std. Dev. Min Max
36