[R-sig-Geo] geoR questions

María Eugenia Utgés meutges at ege.fcen.uba.ar
Fri Jun 12 18:57:59 CEST 2009

---------------------------- Original Message ----------------------------
Subject: Presentation and a "few" Questions (geoR)
From:    María Eugenia Utgés <meutges at ege.fcen.uba.ar>
Date:    Wed, June 10, 2009 5:21 pm
To:      r-sig-geo at stat.math.ethz.ch

 Hello Everyone
I am making my doctorate in biology at the University of Buenos Aires,
I am working on survival and dispersal of the south american fruit fly
(Diptera: Tephritidae), a fruit pest mainly of citrics.
To do so I have field dispersal data (with its x,y coordinates) and have
already perform some spatial analysis with geoR.
My specific questions are:
1- Data must show normality?  What to do if even transformed data does not
2- How do I interpret the cross-validation results?
3- How do I know if I need to take into account anisotropy?
4- When to end the iteration of likfit? till stable values of estimated
5- Is it recommended to present the image of the kriging AND the one
representing variances? how do I generate the latter?
6- Do the kriging image values have a unit, or are they arbitrary?
7- Finally, if you had to present the results (in a paper for example)
what results/data/graphics would you choose?

Hoping to recieve lots(!) of answers,
María Eugenia

Lic. María Eugenia Utgés
Lab. Genética de Poblaciones Aplicada (GPA), Pab. 2, 4to piso, Lab. 105,
Depto. Ecología, Genética y Evolución (EGE)
Fac. Cs. Exactas y Naturales (FCEyN)
Universidad de Buenos Aires (UBA)
Ciudad Universitaria,
Buenos Aires, Argentina

Tel.: 4576-3300, int 218

More information about the R-sig-Geo mailing list