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AW: st: Grouping variables


From   "Martin Weiss" <[email protected]>
To   <[email protected]>
Subject   AW: st: Grouping variables
Date   Fri, 5 Mar 2010 14:32:35 +0100

<> 

" 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: [email protected]
[mailto:[email protected]] Im Auftrag von Martin Weiss
Gesendet: Freitag, 5. März 2010 14:27
An: [email protected]
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: [email protected]
[mailto:[email protected]] Im Auftrag von Katya Mauff
Gesendet: Freitag, 5. März 2010 14:00
An: [email protected]
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.
 
 
 

>>> <[email protected]> 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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