How can I create a varlist?

[VM]

I assume my question may appear very simple but I am stuck in how to
create a varlist.
I really don't find any usefull guide in the net and the Stata Help
file is very unclear to me.

Can anybody kindly give an example on how to do it?

Thanks!

[J]

Can you give some context regarding what you are trying to do?

Technically you can't create and stor a varlist. A varlist just a list
of variables separated by white space. Example: age gender income
race .

In a foreach loop you can tell Stata you are providing a varlist

foreach var of varlist age gender income race {

}

Or you can store a varlist in a local or global macro

local myvars age gender income race


I hope this helps.

[Jared]

Variables in a varlist must also already exist in the current working
dataset, otherwise it's just a namelist.

}

I hope this helps.

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[Eric A. Booth]

see -help macro- and -help ds-

****************************!
sysuse auto, clear

//1. Create using local/global macro

local myvars1 mpg price rep78
di "`myvars1'"
global myvars2 mpg price weight
di "$myvars2"

**you can manipulate these lists:
local oneminustwo: list myvars1 - global(myvars2)
local intersectiononetwo: list myvars1 & global(myvars2)
di "`oneminustwo'"
di "`intersectiononetwo'"

//2. Create and store varlists using -ds-

ds m*
di "`r(varlist)'"
ds, has(type string)
di "`r(varlist)'"
ds, has(type numeric)
di "`r(varlist)'"
ds, has(varlab "*m*")
di "`r(varlist)'"
local myvars3 `r(varlist)'

di "`myvars3'"

**use multiple varlists in a loop**
foreach v in `myvars3' `myvars1' $myvars2 {
di "Summary Table for variable: `v'"
su `v'
}

****************************!
~ Eric

__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebo...@ppri.tamu.edu
eric.a...@gmail.com
Office: +979.845.6754