Sorry - I forgot to mention the code uses Ben Jann's -moremata-.
What is the error?
The example returns the distance matrix and neighbor matrix and then
creates the N variables in the original data set:
: dist
[symmetric]
1 2 3 4
5 6 7 8 9
+-------------------------------------------------------------------------------------------------------------------------------+
1 | 0
|
2 | 5.157033248 0
|
3 | 21.21062478 21.71534226 0
|
4 | 26.95060264 27.64838102 5.939930861 0
|
5 | 16.1570544 21.1565295 30.29833499 34.5960745
0 |
6 | 14.73674249 19.76346139 22.78331973 26.58113711
8.439103366 0 |
7 | 6.614080612 9.633040063 15.1934957 20.70923619
17.14313644 12.30209368 0 |
8 | 22.069818 20.34155009 9.309128607 12.92307095
35.0470512 28.79024435 18.03555849 0 |
9 | 20.67616548 20.42184227 3.226163273 8.078752624
31.37740006 24.32651125 15.24958295 6.116268222 0 |
+-------------------------------------------------------------------------------------------------------------------------------+
+-----------------------------------------------------------------------+
| id latitude longit~e N1 N2 N3 N4 N5 N6 N7 N8 N9 |
|-----------------------------------------------------------------------|
1. | 1 .23851 .0647102 1 1 0 0 0 0 1 0 0 |
2. | 2 .1653217 .0502572 1 1 0 0 0 0 1 0 0 |
3. | 3 .1722953 .3643155 0 0 1 1 0 0 0 1 1 |
4. | 4 .1788673 .4499913 0 0 1 1 0 0 0 0 1 |
5. | 5 .4713051 .043847 0 0 0 0 1 1 0 0 0 |
|-----------------------------------------------------------------------|
6. | 6 .4298635 .1586816 0 0 0 0 1 1 0 0 0 |
7. | 7 .251903 .1594484 1 1 0 0 0 0 1 0 0 |
8. | 8 .0454795 .3190092 0 0 1 0 0 0 0 1 1 |
9. | 9 .1304665 .3436173 0 0 1 1 0 0 0 1 1 |
+-----------------------------------------------------------------------+
Why do you want to store the neighboring unit ids?
Scott
On Sun, Aug 30, 2009 at 10:40 AM, David Torres<[email protected]> wrote:
> I copied and pasted your example, Scott, and got a couple of error messages
> about N matrix not found. I installed the moremata files, but this didn't
> solve the problem. I'm not quite as adept at using stata as some, so,
> please, bear with me. I've never used a mata command, so would like to know
> whether its use will allow for variable creation wheere the unitids can be
> stored and reshaped and all that jazz?
>
> Thanks,
> --------------------------------------------
>
> David Diego Torres, MA(Sociology)
*
* 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/
