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| From | Nick Cox <n.j.cox@durham.ac.uk> |
| To | "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |
| Subject | st: RE: semi variogram Graph??? |
| Date | Thu, 23 Feb 2012 18:10:09 +0000 |
-variog2- is a user-written program on SSC. As mentioned repeatedly on this list, you are asked to explain where user-written commands you refer to come from. I wrote the version on SSC in 2005. Ajita's report does not surprise to me. I would expect it to be slow with that size of dataset. I see that there is a Mata-based version in my files from 2010 which I will send privately to Ajita tomorrow. But it only works with one variogram at a time. Also, it is not smart about earth curvature. It is in fact completely stupid about earth curvature. It is also stand-alone and not linked to any other geostatistical software. Nick n.j.cox@durham.ac.uk Ajita Atreya I have 13,000 observations on property prices and its coordinates. I am trying to make a semi-variogram using the command variog2 price lat long, width(20) lags(1000)...The program ran for the whole night but I got no output. Is it the correct code for semivariogram??? Also, how do I add a new graph in the same plot. For eg semivariogram of residuals and prices together??? * * 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/