Hi Julián, To your bullet point 2:
In 2004 Pawlowsky-Glahn and Olea published a book on compositional data (sum-to-one): Pawlowsky-Glahn, Vera; Olea, Richardo A. 2004. Geostatistical Analysis of Compositional Data. International Association for mathematical geology. Studies in Mathematical Geology no. 7. Oxford University Press. Might be of interest. Best regards, Steinar Sitat Raimon Tolosana <[EMAIL PROTECTED]>: > 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] > > > > > > + > > + To post a message to the list, send it to ai-geostats@jrc.it > > + To unsubscribe, send email to majordomo@ jrc.it with no subject > and "unsubscribe ai-geostats" in the message body. DO NOT SEND > Subscribe/Unsubscribe requests to the list > > + As a general service to list users, please remember to post a > summary of any useful responses to your questions. > > + Support to the forum can be found at http://www.ai-geostats.org/ > > > > > > + > + To post a message to the list, send it to ai-geostats@jrc.it > + To unsubscribe, send email to majordomo@ jrc.it with no subject and > "unsubscribe ai-geostats" in the message body. DO NOT SEND > Subscribe/Unsubscribe requests to the list > + As a general service to list users, please remember to post a > summary of any useful responses to your questions. > + Support to the forum can be found at http://www.ai-geostats.org/ > + + To post a message to the list, send it to ai-geostats@jrc.it + To unsubscribe, send email to majordomo@ jrc.it with no subject and "unsubscribe ai-geostats" in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list + As a general service to list users, please remember to post a summary of any useful responses to your questions. + Support to the forum can be found at http://www.ai-geostats.org/
