AI-GEOSTATS: Job -- Assitant Professor of Georaphy, specializing in spatial stats etc.

2003-11-28 Thread Frank Hardisty
Hello All, Please forward this notice to potential candidates. SOUTH CAROLINA, COLUMBIA 29208. University of South Carolina. The Department of Geography invites applications for a tenure track position in GIScience/Geocomputation at the rank of Assistant Professor to begin August 15, 2004 or

Re: AI-GEOSTATS: About gstat and binomial negative family data

2003-11-28 Thread Brian R Gray
you could modify the suggested approach by using a generalization of the Poisson, the neg binomial assumption you mention. most stat software allows negative binomial regression. in this case, the variance component of the Chi-squared resids may be better approximated (than under the Poisson ass

Re: AI-GEOSTATS: Detecting spatial autocorrelation in highly nonnormaldata]

2003-11-28 Thread Edzer J. Pebesma
Ruben Roa Ureta wrote: Yes, that is a nice comment. However, you cannot shake natural population to destroy the mechanisms that determine their functioning and make them random. I gotta go now, or else I miss the soccer game! R. You can shake the (imaginary) bottle with all sample locations, fr

Re: AI-GEOSTATS: About gstat and binomial negative family data

2003-11-28 Thread Edzer J. Pebesma
Marcelo Alexandre Bruno wrote: Whats wrong? Someone could help me? I don't know if something is wrong. Maybe your data don't exhibit much spatial correlation, maybe they are so skew that without transformation you just don't see any in sample variograms. The family of distribution of M. stehmanni

RE: AI-GEOSTATS: Moran scatterplot

2003-11-28 Thread Pat Bellamy
Title: RE: AI-GEOSTATS: Moran scatterplot -Original Message- From: Pat Bellamy Sent: 28 November 2003 13:57 To: 'Monica Palaseanu-Lovejoy' Subject: RE: AI-GEOSTATS: Moran scatterplot Dear Monica I think it would be worth looking at the following papers as it should give a

Re: AI-GEOSTATS: Moran scatterplot

2003-11-28 Thread Isobel Clark
Monica The simplest solution to your problem is to use probability paper. If you do not have easy access to this, you can download a free graph paper plotter from http://perso.easynet.fr/~philimar There are also simple algorithms to produce your own. Two populations show up on a probability plo

Re: AI-GEOSTATS: gstat in R doubts

2003-11-28 Thread Edzer J. Pebesma
(I added gstat-info to the addressees, as I believe this message and possibly further discussion better belong there) -- Edzer Marta Rufino wrote: Dear Collegues, I have some particular doubts about gstat for R (most probabily very basic for what I apoligise): 1. Does it compute indicator krigi

AI-GEOSTATS: Moran Scatterplot

2003-11-28 Thread Monica Palaseanu-Lovejoy
Hello list,  I need your help to interpret this. I am working with contamination  data in soil. I think the dataset has two populations, one representing a diffusive process (the majority of the data) and a point source process which generates outliers - or it seems part of them. I used the M

AI-GEOSTATS: Moran scatterplot

2003-11-28 Thread Monica Palaseanu-Lovejoy
Hi everybody, I want to ask your opinion on some results from Moran scatterplot. I am working with soil contamination data, and in my opinion the dataset is formed by 2 different distributions, one more diffusive which is the majority of the data, and one generated by a point source process re

AI-GEOSTATS: backtransformation

2003-11-28 Thread Marta Rufino
Dear list members, I would like to know if anyone has information or bibliography on backtransformation of the variogram or the variogram model. I have 2 ref. only (Armstrong and Guiblin et al. 1995). Is this supose to give similar results to the log-normal kriging? Could anyone point me bibliogr