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Cokriging with a categorical covariable?

Question asked by Beggady on May 20, 2015
Latest reply on May 20, 2015 by hlzhang525



Hello, sorry for any cross postings - I posted this question yesterday but don't think I posted it in the right space.


I am using cokriging to model a continuous variable across my study unit (soil carbon). I have one continuous covariable (soil moisture) but also a categorical covariable (vegetation community). I am using the Geostatistical Analyst Wizard to do this. (I ran linear models in R to establish the significant covariables and any transformations required).


Am I right in thinking that I can't include the categorical covariable directly into the model? If so, can anyone please suggest a way that I can include this information within a cokriging model?


I am using cokriging as it is enabling me to compare the cross validation statistics with and without the covariables. But open to suggestions of other methods which allow inclusion of covariables and provide some idea of model fit, that I can apply in ArcMap.


Many thanks