It sounds as you need to use -egen, tag()- to tag each district once in conjunction with other -egen- calls-.
Nick
[email protected]
moleps
Thx, Martin. However I need to sum the total number of people in each region comprised of from 3-10 different districts. Using
> by region yr: egen totpop=total(distr_pop)
entails summing the district_population the same number of times as the number of cases. What I want is to sum the different districts for each year for a total regional population.
+--------------------------------------------------------------+
| pid distr_~p district region yr number totpop |
|--------------------------------------------------------------|
| 221 440674 3 1 1953 7 2802725 |
| 684 440674 3 1 1953 7 2802725 |
| 574 158681 6 1 1953 7 2802725 |
| 770 440674 3 1 1953 7 2802725 |
| 869 440674 3 1 1953 7 2802725 |
|--------------------------------------------------------------|
| 454 440674 3 1 1953 7 2802725 |
| 497 440674 3 1 1953 7 2802725 |
| 790 444041 3 1 1954 1 444041 |
| 802 112982 13 2 1954 1 112982 |
| 767 227937 18 4 1954 1 227937 |
|--------------------------------------------------------------|
| . 139172 8 . 1953 0 139172 |
+--------------------------------------------------------------+
//M
On 11. jan. 2010, at 17.24, Martin Weiss wrote:
>
> <>
>
>
>
> *************
> clear*
>
> input pid distr_pop district region yr
> 221 440674 3 1 1953
> 869 440674 3 1 1953
> . 139172 8 . 1953
> 497 440674 3 1 1953
> 684 440674 3 1 1953
> 574 158681 6 1 1953
> 770 440674 3 1 1953
> 454 440674 3 1 1953
> 767 227937 18 4 1954
> 802 112982 13 2 1954
> 790 444041 3 1 1954
> end
>
> compress
>
> bys region yr: egen number=count(pid)
> by region yr: egen totpop=total(distr_pop)
>
> li, noo
> *************
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]] Im Auftrag von moleps
> Gesendet: Montag, 11. Januar 2010 17:19
> An: [email protected]
> Betreff: Re: st: AW: generating count and sum variable over two different
> categorical variables
>
> Sorry...
>
>
> . list pid distr_pop district region yr in 50/60
> | pid distr_pop district region yr |
> |---------------------------------------------|
> 50. | 221 440674 3 1 1953 |
> 51. | 869 440674 3 1 1953 |
> 52. | . 139172 8 . 1953 |
> 53. | 497 440674 3 1 1953 |
> 54. | 684 440674 3 1 1953 |
> |---------------------------------------------|
> 55. | 574 158681 6 1 1953 |
> 56. | 770 440674 3 1 1953 |
> 57. | 454 440674 3 1 1953 |
> 58. | 767 227937 18 4 1954 |
> 59. | 802 112982 13 2 1954 |
> |---------------------------------------------|
> 60. | 790 444041 3 1 1954 |
> +---------------------------------------------+
>
> So what I need to do is generate a variable counting the number of cases
> from each region for each year and also a variable containing the sum of the
> population for each region for each year. There are between 3 and 10
> districts in each region.
>
> Any idea or do I have to program it from scratch?
>
> Regards,
> M
>
>
>
>
>
> On 11. jan. 2010, at 17.06, Martin Weiss wrote:
>
>>
>> <>
>>
>>
>>
>> As always: Show an excerpt of your data!
>>
>>
>>
>> HTH
>> Martin
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: [email protected]
>> [mailto:[email protected]] Im Auftrag von moleps
>> Gesendet: Montag, 11. Januar 2010 16:58
>> An: [email protected]
>> Betreff: st: generating count and sum variable over two different
>> categorical variables
>>
>> Dear listers,
>> I´m doing a survival analysis, but also need to present some graphs on a
>> regional level. In other words my data is setup on an individual level
> with
>> categorical variables for year and region. What I need to do is generate a
>> count variable for the cases counted over year AND region. Using the -
> egen
>> total- command I´m only able to sum over either year or region. Not both
> as
>> far as I understand. Also is there a way to sum over two categories, not
>> just one.
>>
>> ie my data is setup according to
>>
>> case year region
>>
>> and i´d like it setup acording to
>>
>> case year region #cases/year/region
*
* 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/
