Hello Julián
Short questions, short answers:
1.- as many as you want, as far as you trust the estimation of so many
cross-covariances
2.- yes, you can. And yes, you can impose such kind of constraints. For
inequality constraints, the book of Chilès and Delfiner (1999) gives
some ideas. For the sum-up-to-one problem, better look at the
"compositional" literature: Walwoort and de Gruijter (2001), or
Pawlowsky-Glahn (1989); I personally work with the second option.
3.- those above, both on the journal "Mathematical Geology"
4.- no in general, but if you want to follow Pawlowsky's approach, then
you can easily transform your data with a spreadsheet, with "Surfer"
itself or with a simple function if you use "gslib" or any of the
several "R" packages
regards
Raimon
En/na [EMAIL PROTECTED] ha escrit:
Hello!
I have some questions about collocated cokriging,
1. How many secondary variables could I use in collocated cokriging?
2. Could I estimate several primary variables simultaneously in collocated
cokriging? Could I impose a criteria with these variables, for example V1 >
V2, or V1+V2+V3=1?
3. Do you know any article about these items?
4. Do you know any software to run these methods?
Thank you very much.
Prof. Julián Gonzalo
Universidad de Valladolid
[EMAIL PROTECTED]
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