Ciao Sebastiano, actually I am looking for statistical tests for comparing two variogram grids of two different variables to quantify probabilities to have...
2493
diane poon
diane.poon@...
Mar 29, 2006 8:34 am
if anyone has information on this i'd love to hear it I also have nested structures from my semi-variogram analysis of peatland structures diane ... -- "I love...
2494
seba
sebastiano.trevisani@...
Mar 29, 2006 8:35 am
Ciao Gregoire I had the feeling that you need some automatic stuff!!! In this case, probably, the idea to compare variogram model parameters isn't good because...
2495
Cardellini C.
geochem@...
Mar 29, 2006 8:40 am
Dear List members, can you suggest papers or book about the interpretation (e.g. geologic interpretation) of nested structures? More in detail I have data set...
2496
Yetta Jager
jagerhi@...
Apr 6, 2006 10:54 am
Dear list, Is anyone familiar with both time series (i.e., lagged distribution and panel models) and geostatistics? I am having trouble finding methods for ...
2497
M.J. Abedini
abedini@...
Apr 9, 2006 5:52 pm
Dear Colleagues The following arguement puzzling me. Your clarification will be greatly appreciated. When a random funtion Y(x) is not stationary, then one...
2498
Feng Liu
asherliu@...
Apr 9, 2006 5:52 pm
Dear list: I was trying to use cokriging to estimated soil N content while using NDVI as a secondary variable. I am confused of how GSLIB arrange the...
2499
Pierre Goovaerts
Goovaerts@...
Apr 9, 2006 5:52 pm
Hi Feng, Indeed, you need to create a single file with the two variables combined and use a "missing value code" (i.e. below the trimming limit) at all...
2500
Dan Bebber
danbebber@...
Apr 9, 2006 5:53 pm
Yetta, if you are using R, then try ?acf. There is a good intro in MASS4. Also library(tseries). AFAIK, you can use geostatistics on time series, as you would...
2501
Isobel Clark
drisobelclark@...
Apr 19, 2006 12:06 pm
Hi. At last one I can answer (i.e. an easy one): If the phenomenon is non-stationary then the semi-variogram is NOT: (1) 2\gamma(x,x')=Var[Y(x)-Y(x')]^2 but ...
2502
seba
sebastiano.trevisani@...
Apr 19, 2006 12:06 pm
Hi You could also express the variogram in this other form........ 2gamma(h) = Var{Z(u)-Z(u+h)} = E{[Z(u)-Z(u + h)]^2}-E{ Z(u)-Z(u+h)}^2 the second element of...
2503
acullma@...
Apr 21, 2006 8:03 am
Dear list, I am trying to compare kriging results from different geostats software. The sample size is smaller than 300, I use real data as well as simulated ...
2504
acullma@...
Apr 21, 2006 8:03 am
Dear List, Thank you for all your help: It's been 'duplicates' that caused my problems. Now I'm running into further difficulties: I'm using disjunctive...
2505
M.O. Franz
nips06pub@...
Apr 21, 2006 8:03 am
CALL FOR PAPERS – NIPS*2006 Deadline for Paper Submissions: June 9, 2006 Submissions are solicited for the twentieth annual meeting of an interdisciplinary...
2506
Mark Sweeney
MarkSweeney@...
Apr 21, 2006 8:03 am
Dominik As a first pass you should try looking for duplicate values. From my experience Isatis falls over when kriging with duplicate data. Isatis has a...
2507
Rajni Gaur
rajni.geophy@...
Apr 21, 2006 8:04 am
Respected List, I have the correlation curves for two different dataset of the same region, at two different timings. I have two equations y=m1x + c1 and ...
2508
Mahdi Osman
m_osm@...
Apr 27, 2006 12:16 pm
Dear Isobel Clark, Dear List, I have your posting regrding cross validation. Yesterday and this morning I had similar, but not identical, problems. So I was...
2509
M. Nur Heriawan
mn_heriawan@...
Apr 27, 2006 12:16 pm
Dear everyone, One of my colleague asked me about the mathematical equation of cross-validation method (leave-one-out method), and I said that it depends on...
2510
Colin Badenhorst
CBadenhorst@...
Apr 27, 2006 12:17 pm
Hi List, Can anyone recommend some references to a mine geologist looking for an introduction to Uniform Conditioning? I'm especially interested in it's ...
2511
Adrián MartÃn...
amvargas@...
Apr 27, 2006 12:18 pm
see Isatis examples in www.geovariances.fr Adrian MartÃnez Vargas Departamento de GeologÃa ISMM, Las Coloradas s/n Moa, HolguÃn Cuba CP 83329 ... From:...
2512
Isobel Clark
drisobelclark@...
Apr 27, 2006 12:22 pm
Hi Prior to 1983, most people used cross validation to check whether their kriging methods were working or to compare one kriging method with another. After...
2513
Raimon Tolosana
raimon.tolosana@...
May 2, 2006 10:05 am
Dear Mahdi Quickly said, you cannot compare both nuggets, because they do not share units... (well, the logarithmic one may be considered to have no units, but...
2514
Mahdi Osman
m_osm@...
May 2, 2006 10:06 am
Raimon Tolosana-Delgado, Many thanks. This was very helpful indeed. Regards Mahdi ... -- ... Mahdi Osman (PhD) E-mail: m_osm@... ... Echte DSL-Flatrate...
2515
Collier, Perry (TS)
Perry.Collier@...
May 2, 2006 10:06 am
Hi List Maybe this topic has been done to death, but I'd like to poke the carcass if I may... Edward Isaaks via AI (15 February 2006) said of a paper by Van et...
2516
Collier, Perry (TS)
Perry.Collier@...
May 2, 2006 10:06 am
Ps: Found a good start in THE KRIGING OXYMORON: A CONDITIONALLY UNBIASED AND ACCURATE PREDICTOR (2nd EDITION) by Isaaks, but the maths made me see stars... ......
2517
Alexandre Boucher
alexandre.boucher@...
May 2, 2006 10:07 am
Dear ai-geostat community, A new version (1.4) of the open source Stanford Geostatiscal Earth Modeling Software, SGeMS, has now been released. You may...
2518
seba
sebastiano.trevisani@...
May 5, 2006 9:46 am
dear Reza Nazarian I think that there are many things to say about this topic.....(for example the idea to use a gaussian distribution for porosity should be...
2519
Reza Nazarian
rnazarian@...
May 5, 2006 9:47 am
Dear Experts I have a problem to solve. I want to create a porosity map or a porosity 3D grid or volume out of some borehole information. I am using methods...
2520
Gregoire Dubois
aigeostats
May 16, 2006 8:17 am
Dear all, I'm currently trying to figure out what is going on with the list server of ai-geostats: 90% of the addresses registered are bouncing and I received...
2521
Gregoire Dubois
aigeostats
May 16, 2006 8:18 am
Dear all, For various technical reasons, AI-GEOSTATS has to move again after 2 years running with the SYMPA mailing list server from the University of ...
