Dear Colleagues I would like to generate a 2-D random field with a particular distribution in frequency domain and some known spatial structure in space ...
745
Carolina Garcia Imhof
garca917@...
Nov 5, 2002 9:16 am
Hi. I have a question which is not directly related to geostatistical analysis... What is the relationship between the gaussian model used in geostatistics and...
746
Isobel Clark
drisobelclark@...
Nov 5, 2002 9:16 am
Carolina The gaussian semi-variogram model is so-called because the formula is basically identical to that for the Normal (or gaussian) probability...
747
Carolina Garcia Imhof
garca917@...
Nov 6, 2002 9:34 am
Hi everybody, Thanks for your answers. I had seen the similarity between the formulas, but I thought there could have been more to it than just similarity....
748
Adrian MartÃnez V...
amvargas@...
Nov 14, 2002 12:16 pm
Some one know where is possible to download freeware that perform cross validation with Inverse of the Distance. -- * To post a message to the list, send it to...
749
Adrian MartÃnez V...
amvargas@...
Nov 14, 2002 12:16 pm
I'm creating a accurate grid from regular data, I have to a les accurate data that reflect the local drift information, irregular sampled but more dense; for...
750
Adrian Martínez Va...
amvargas@...
Nov 18, 2002 11:46 am
As it is usual in Oil reservoir modelling, it seem you have a very dense geophysical information (may be acoustic impedance) and low dense information from...
751
Pierre Goovaerts
goovaert@...
Nov 18, 2002 11:46 am
Hi Tomislav, Don't be surprised. It is my experience that cross-validation might sometimes indicate that best interpolation results are obtained using the...
752
Carolina Garcia Imhof
garca917@...
Nov 18, 2002 11:46 am
Dear list members, I have used geoeas until now, which uses a limited number of models. However, I found a program, CurveExpert, which finds the best fitting...
755
Ian Glacken
iglacken@...
Nov 18, 2002 11:46 am
I have a very interesting problem - I need to interpolate a geophysical parameter into the earth. Using a latitude/longitude coordinate system isn't good...
756
Tomislav Malvic RGNF
tmalvic@...
Nov 18, 2002 11:46 am
Dear all, This is my first try at geostat mailing list, and maybe my question will not be very "professional". I work with data set of porosity in one oil...
757
Pierre Goovaerts
goovaert@...
Nov 18, 2002 11:46 am
Hi Carolina, You can not fit any type of curve to your experimental variograms since the model needs to be permissible, hence the practice to fit only a...
758
Carolina Garcia Imhof
garca917@...
Nov 21, 2002 8:37 am
Here is the summary to my question: I have used geoeas until now, which uses a limited number of models. However, I found a program, CurveExpert (AVAILABLE AT ...
759
Isobel Clark
drisobelclark@...
Nov 21, 2002 1:19 pm
... I hate to sound ignorant here, but aren't most of the standard semi-variogram models polynomials of one kind or another? I remember seeing a paper a few...
760
Colin Daly
colin@...
Nov 21, 2002 1:27 pm
I think that Pierre and Don Myers gave the correct response. For beginners the lesson must be that you cannot use any old function (and in particular a ...
761
Tomislav Malvic RGNF
tmalvic@...
Nov 25, 2002 8:17 am
Here is the review of answers on my mail "Kriging versus Inv. Dist. Weighting" from Nov 15: Dear all, This is my first try at geostat mailing list, and maybe...
762
Digby Millikan
digbym@...
Nov 25, 2002 8:17 am
Hello, I was wondering if some one could reccomend a book on statistics which covers the basic theories of probability (expectations), least squared errors and...
763
Digby Millikan
digbym@...
Nov 27, 2002 7:57 am
Hello, I was wondering if some one could reccomend a book on statistics which covers the basic theories of probability (expectations), least squared errors and...
764
Digby Millikan
digbym@...
Nov 27, 2002 7:57 am
Thanks Donald, I'll look into these. Regards Digby Millikan. ... From: Donald E. Myers To: Digby Millikan Sent: Tuesday, November 26, 2002 4:24 AM Subject: Re:...
765
Digby Millikan
digbym@...
Nov 27, 2002 7:57 am
Thanks Isobel, I have purchased and am reading Practical Geostatistics 2000 at the moment, but as it is a few years since I took maths and statistics courses I...
766
Mathias Tobler
mtlist@...
Nov 28, 2002 10:57 am
I am using Ripley's K to analize distribution patterns of trees in a forest plot. Here some basic information. The plot is 1000 x 1000 m. There are 7765 trees...
767
Mathias Tobler
mtlist@...
Nov 28, 2002 10:57 am
I am using Ripley's K to analize distribution patterns of trees in a forest plot. Here some basic information. The plot is 1000 x 1000 m. There are 7765 trees...
768
Gregoire Dubois
aigeostats
Nov 28, 2002 10:57 am
Good day everyone, I'm looking for a Surfer script (for version 7) that is performing cross-validations. I received 5 years ago scripts from Maciej Tomczak and...
769
Alfred Stach
frdstach@...
Nov 29, 2002 8:23 am
Dear Gregoire, In the attachment you can find Surfer 7 script for cross-validation (it is included in standard installation of the Surfer - in the scripts...
770
Syed Abdul Rahman Shi...
syed@...
Nov 29, 2002 8:23 am
... There are in fact situations where you might want to use the mean absolute deviation from the mean (madogram) since any squared term would amplify the ...
771
Digby Millikan
digbym@...
Nov 29, 2002 8:23 am
Hello, I was wondering if someone can tell me about statistical parameters, why standard deviation and variance is used as opposed to mean absolute deviation...
772
Digby Millikan
digbym@...
Nov 29, 2002 10:29 am
Hello, Here is a summary of responses to my posting, thanks to Donald for his most informative summary, and Isobel for her book which I am reading. ...
773
Isobel Clark
drisobelclark@...
Dec 2, 2002 8:46 am
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...
