<>
Note Nick`s http://www.stata-journal.com/sjpdf.html?articlenum=gn0017, page
15, table 3: -generate- has been around for quite some time...
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Michael
McCulloch
Gesendet: Mittwoch, 7. Oktober 2009 22:50
An: [email protected]
Betreff: Re: st: identifyng records in a group that have a field with nearby
values from another group
Thanks Scott. Is the code in the second line of the loop, beginning
with -gen- specific to Stata11?
At that line my Stata10 returns "unrecognized command: generate
invalid command name"
Michael
sysuse auto, clear
levelsof price if fore ==1 ,local(levels)
foreach l of local levels {
gen group_`l' = 1 if price > `l' -200 & price < `l' + 200 &
fore == 0
}
sort price
l fore make price if group_4296 ==1
On Oct 7, 2009, at 1:01 PM, Scott Merryman wrote:
> On Wed, Oct 7, 2009 at 2:33 PM, Michael McCulloch
> <[email protected]> wrote:
>> Hello,
>> I have a dataset with two groups, for example "foreign" and
>> "domestic" in
>> the auto dataset.
>> For example:
>> sysuse auto, clear
>> sort foreign price
>> list foreign make price
>>
>> My question is, how to identify "domestic" cars that are within
>> $200 in
>> price from each "foreign" car, and create another variable called
>> "group"
>> that mark these sets?
>>
>> In this case, that would be:
>> Foreign Fiat Strada 4,296
>> Domestic AMC Concord 4,099
>> Domestic Pont. Sunbird 4,172
>> Domestic Olds Omega 4,181
>> Domestic Ford Mustang 4,187
>> Domestic Olds Starfire 4,195
>> Domestic Ford Fiesta 4,389
>> Domestic Pont. Phoenix 4,424
>> Domestic Plym. Champ 4,425
>> Domestic Buick Opel 4,453
>> Domestic Plym. Horizon 4,482
>>
>
> Something like this?
>
> sysuse auto, clear
> levelsof price if fore ==1 ,local(levels)
> foreach l of local levels {
> gen group_`l' = 1 if price > `l' -200 & price < `l' + 200 &
> fore == 0
> }
> sort price
> l fore make price if group_4296 ==1
>
> Scott
>
> *
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> * http://www.stata.com/help.cgi?search
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Michael McCulloch, LAc MPH PhD
Pine Street Foundation
124 Pine Street
San Anselmo, CA 94960-2674
tel: 415-407-1357
fax: 206-338-2391
[email protected]
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
