Скачать или смотреть foreach loop || STATA || Econometrics Melody || U/Graduate || Mphil /Phd

27 May 2022 [Friday]
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Some of the commands used in this tutorial are as given below:

clear
cls
set obs 21


*** gen 5 variables
forvalues i=1/5{
gen a`i' = round(runiform()*300)
}


***** foreach loop ***************
***************************
*** anylist

foreach x in "summ" "descri" "reg" "corr"{
`x' a1-a5
}
*

foreach x in a1 a2 a3 a4 a5{
summarize `x'
}
*

foreach x in a1-a5{
summarize `x'
}
*

*** varlist
foreach x of varlist a1-a5{
summarize `x'
}
*
***************************

foreach x in 1 2 3 5 9 13/21{
display `x'^3
}
*

*** numlist
foreach x of numlist 1 2 3 5 9 13/21{
display `x'^3
}
*

***************************

*** local
local x a1-a5
foreach m of local x{
summarize `m'
}
*

local x a1-a5
foreach m in `x'{
summarize `m'
}
*
***************************

*** global
global x a1-a5
foreach are of global x{
list `are'
}
*


foreach m in $x{
list `m'
}
*
***************************

*** newlist
clear
cls
set obs 21

foreach x of newlist b1-b31{
gen `x' = round(runiform()*1000)
}
*

summarize
***************************


*****Example***********
*** nested loop

clear
cls
set obs 21
global x a b c d


foreach m in $x {
gen `m' = round(runiform()*500)
}

** gen vars crossproducts of a b c d
foreach p in $x {
foreach q in $x{
gen `p'`q' = log(`p') + sin(`q')
}
}
*

summarize



We hope that you will find this useful.

Many Thanks
Econometrics Melody