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Re: AW: st: Grouping variables


From   GORLE Steven <steven.gorle@telenet.be>
To   statalist@hsphsun2.harvard.edu
Subject   Re: AW: st: Grouping variables
Date   Fri, 05 Mar 2010 15:11:30 +0100

Dear,

I realize there is a lot of coding. But there is a workaround! Try to get a list from an external source (eg. USPS, national post service, ...) with the provinces, cities or maybe zip-codes.
If you can find this, you can merge the file.

merge m:1 city using usps


Hope this can help!

Kind regards,

Steven Gorlé


Op 5/03/2010 14:32, Martin Weiss schreef:
<>

" Better still, assign numeric identifiers, and use a -value label- to
represent the strings..."


As in:


*************
clear*
inp str1 city
a
b
c
d
e
f
g
end

gen byte province=inlist(city, "b","c","d")+ /*
*/ 2*inlist(city, "e","f","g")+3*inlist(city, "a")

la def prov 1 "a" 2 "b" 3 "c"
la val province prov

list, noo
*************



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Martin Weiss
Gesendet: Freitag, 5. März 2010 14:27
An: statalist@hsphsun2.harvard.edu
Betreff: AW: st: Grouping variables


<>

"

gen province=a if (city=="b"|city=="c"|city=="d")
replace province=b if (city=="e"|city=="f"|city=="g")

"



Those province identifiers would have to carry quotation marks around them:


*************
clear*
inp str1 city
a
b
c
d
e
f
g
end

gen str1 province="a" if inlist(city, "b","c","d")
replace province="b" if inlist(city, "e","f","g")

list, noo
*************

Better still, assign numeric identifiers, and use a -value label- to
represent the strings...


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Katya Mauff
Gesendet: Freitag, 5. März 2010 14:00
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: Grouping variables

Dear Alejandra

Try using an if statement. So for example:

gen province=a if (city=="b"|city=="c"|city=="d")
replace province=b if (city=="e"|city=="f"|city=="g")

etc.

I know it's slightly tedious, esp if you have several cities/provinces.
Perhaps someone else can come up with a quicker way to do it.




<mmolina@uniroma3.it>  2010/03/05 02:47 PM>>>
Dear Statalits,
In my database I have a variable, called "city" which represent firms'
main base. It is a string variable that I've already encoded in an
another.
I have a lot of other information about the firms and I need to work at a
more aggregated level, for instance "province", could you please tell me
how to assign different cities to one province?
Thanks in advance.
Best regards,
Alejandra

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