Re: AI-GEOSTATS: Intrinsic Random Functions -- what it mean for lambda to annihilate a polynomial?

2007-07-21 Thread Isobel Clark
Olumide I recommend you work through our free tutorial on kriging with trend. It discusses Universal Kriging rather the IRF-K but I think it will answer your question better than I can do in a short email. Yes you can annihilate the trend by making the weighted average of the trend e

Re: AI-GEOSTATS: Intrinsic Random Functions -- what it mean for lambda to annihilate a polynomial?

2007-07-21 Thread Olumide
Isobel Clark wrote: I would think what they mean is that each order of polynomial has to be balanced between the 'drift' at the actual estimated point and the weighted average of the samples which proovides the estimator. For this you have to introduce an extra lamda and an extra equation on th

Re: AI-GEOSTATS: Intrinsic Random Functions -- what it mean for lambda to annihilate a polynomial?

2007-07-21 Thread Isobel Clark
Olumide I would think what they mean is that each order of polynomial has to be balanced between the 'drift' at the actual estimated point and the weighted average of the samples which proovides the estimator. For this you have to introduce an extra lamda and an extra equation on the krigi