Hi Digby The short answer to your least squares question is 'because Matheron was a least squares person' ;-) There are three basic schools of statistics: (1)...
774
avari40
Avari40@...
Dec 2, 2002 8:46 am
Dear members of ai-geostats, I must apologize for posting such a ill-typed mail. I have edited a new one and hope this will be more readable. Thank you very...
775
Noemi Barabas
barabas@...
Dec 2, 2002 8:46 am
Dear list members, I hope to get some insight into modeling and kriging with 3-D variograms where all 3 directions display a pronounced...
776
Digby Millikan
digbym@...
Dec 2, 2002 8:46 am
Noemi, Is this a hypothetical situation, or is this real data which you have which displays hole effect in three directions, just curious. Regards Digby...
777
Michael Pyrcz
mpyrcz@...
Dec 2, 2002 4:16 pm
Good Day, Here are some points on the hole effect variogram model in GSLIB. o. The cosine hole effect applied in GSLIB is only positive definite (permissible)...
778
Digby Millikan
digbym@...
Dec 2, 2002 4:16 pm
Pei-Chun, Question 1, You may be interested in some of these points on lognormal kriging, as I have been involved with lognormal kriging of datasets, but not...
779
Munroe, Darla K
dkmunroe@...
Dec 4, 2002 3:07 pm
Does anyone happen to have any code (e.g., Matlab or the like) or other tips for calculating the sum of squares for a reasonably large grid using the ...
780
Gregoire Dubois
aigeostats
Dec 4, 2002 3:07 pm
Good news, after 2 years of hibernation, www.ai-geostats.org is running again properly (e.g. the search scripts are working again, many links have been...
781
Digby Millikan
digbym@...
Dec 5, 2002 10:57 am
Hello, My inital enquiry about why variance is used as a basis for geostatistics appears to be the tip of the iceberg of many reasons and a large amount of...
782
Isobel Clark
drisobelclark@...
Dec 6, 2002 8:41 am
... Things have obviously changed since I was a lad. I was taught that the Central Limit Theorem was a theorem NOT a law. There are distributions which do not ...
783
Isobel Clark
drisobelclark@...
Dec 6, 2002 8:41 am
I find this fascinating. Apparently what I said is almost entirely wrong. What I said was 'I was taught that.......' I do not recollect Don Myers being in my...
784
Digby Millikan
digbym@...
Dec 6, 2002 8:41 am
Isobel, ... Is this the reason for transforming the data (only upto page 14). At the moment I am thinking kriging minimizes the variance of the sampling...
785
Digby Millikan
digbym@...
Dec 6, 2002 8:41 am
Apologise, The original email, ... was not written by Isobel, it came from W.D. Allen on sci.stat.math which I posted in the summary of my replies. Thankyou...
786
Ruben Roa
rroa@...
Dec 6, 2002 8:41 am
Isobel did not write the careless paragraph about the central limit theorem (CLT) Don replied to, as pointed out by Digby. I wish to add something to what Don...
787
John.Butler@...
Dec 9, 2002 1:59 pm
Hello, Is there anything available which could help with the following? I have a true size distribution of particles which I wish to selct from and place...
788
Isobel Clark
drisobelclark@...
Dec 9, 2002 1:59 pm
Thank you Isobel ... __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email...
789
Isobel Clark
drisobelclark@...
Dec 9, 2002 1:59 pm
Thanks to Rubén and Digby for pointing out what I had misunderstood about Don Myers' email. It had not occurred to me (duh) that the lines starting '>' would...
790
Ignacio García
ignaciogarcia@...
Dec 12, 2002 8:43 am
Dear listers: Does anybody know any application of geostatistical theory to real estate valuation? . The values of the buildings can be modelized as points...
791
Tomislav Malvic
tmalvic@...
Dec 17, 2002 5:37 pm
Dear all, Does anybody have experience with module 'ik3d' in GSLIB for DOS? This is routine for Indicator Kriging. I'm not sure if it works properly, because ...
792
Marius Gilbert
mgilbert@...
Dec 17, 2002 5:37 pm
Dear colleagues, I have a set of presence/absence spatial data (1,0) representing the locations of site infested/uninfested trees by a tree pest. The ...
793
Pierre Goovaerts
goovaert@...
Dec 17, 2002 5:37 pm
Hi Marius, There are different ways to deal with a trend, which depends whether it is considered as global (i.e. over the entire area) or local (i.e. within...
794
Elizabeth Stevick
estevick@...
Dec 17, 2002 5:38 pm
Hello, I have some categorical data that I need to interpolate onto a 3D finite difference mesh. Therefore I need a program that will perform indicator ...
795
Pierre Goovaerts
goovaert@...
Dec 17, 2002 5:38 pm
Elisabeth, An easy way would be to use the option jackknife of the Gslib program ik3d. Just put the spatial coordinates of your grid nodes into the file that...
796
Ruben Roa
rroa@...
Dec 18, 2002 3:11 pm
... Yes. The model must be fitted my maximum likelihood. ... The algebraic expression for the AIC results from the bias in the maximum log-likelihood of a...
797
Gregoire Dubois
aigeostats
Dec 18, 2002 3:11 pm
Dear all, I'm looking for a Windows software able to perform a 2D computation (either sandbox or box counting) of the fractal dimension of a monitoring...
798
vanessa stelzenmül...
vstelzenmueller@...
Dec 18, 2002 3:11 pm
Dear all, The AIC is used to select the "best" model from a list of theoretical functions. I wonder if its necessary the models need to be fitted by the same...
799
Marius Gilbert
mgilbert@...
Dec 18, 2002 3:11 pm
Dear Colleagues, Two responses to my post to the list concerning indicator kriging in the presence of a trend were posted to the list by Isobel Clark and...
800
Claudio Cocheo
ccocheo@...
Dec 18, 2002 3:11 pm
Dear all, ... Please, let me know. I'm interested in the AIC. If I have 3 models each one fitted with a least square method, are them suitable for AIC...
801
Brian R Gray
brgray@...
Dec 18, 2002 3:11 pm
suspect Ruben would note that, under a normal assumption, OLS and ML coincide. also, I suspect that Ruben's comments also apply to REML results--altho in that...
802
Ruben Roa
rroa@...
Dec 19, 2002 8:40 am
... coincide. True, though i'd say that OLS is a particular case of MLE iff the process being modelled is additive and the additive stochastic component is...
