AI-GEOSTATS: answers to gaussian model
- 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. Here is
a summary of all responses.
> I have a question which is not directly related to geostatisticalanalysis...
> What is the relationship between the gaussian modelA partial answer to your question is simply that the functional form of
> used in geostatistics and the "classical" gaussian function or
> or how it came to be known as a gaussian model?
the gaussian variogram is the
same as the functional form for the probability density function for a
gaussian random variable.
Donald E. Myers
The gaussian semi-variogram model is so-called because
the formula is basically identical to that for the
Normal (or gaussian) probability distribution.
There is no other necessary link with the Normal
yes ..... the Gaussian model ..... a misnoma really: it should be
clear where the term comes from - just look at the functional form: it
is identical to the functional form of a Gaussian. I always call this
model the squared exponential covariance function (since there is
nothing 'Gaussian' about it other than the form) - and by the way if you
think in a processed based way this is a terrible variogram to use,
unless you believe the field you are dealing with is really infinitely
Dr Dan Cornford
Computer Science Tel: 0121 359 3611 x4667
Aston Univeristy Fax: 0121 333 4586
Birmigham, B4 7ET, UK Email: d.cornford@...
Gaussian distribution or normal distribution has a multiple of exp(-x^2)
as its probability density function. Gaussian variogram has similar term
in its definition.
Hope this help.
La ecuación del variograma gaussiano es g(h)=C(1-exp(-(h/a)^2)
el nombre gaussiano es un muy mal nombre y solo corresponde a la
entre esta función y el modelo normal.
Carolina Garcia Imhof
Marine Mammal Research Group
Marine Science Department
310 Castle Street, PO Box 56
University of Otago
Dunedin, New Zealand
Fax: 64 3 479 8336
Phone: 64 3 479 5476
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