Spatial model for inconvenient pot layout?

From: Alexander Zwart <Alec.Zwart_at_CSIRO.AU>
Date: Thu, 9 Aug 2007 16:44:58 +1000

Dear list members

 

I have data from a series of Cabinet trials and am wondering if

AR-style spatial modelling is going to be appropriate/feasible for my

situation.

 

Within each trial there are four tanks, with 77 plants in pots

placed in each tank in a 9 x 17 "checkerboard" pattern:

 

O O O O O O O O O

 O O O O O O O O

O O O O O O O O O

 O O O O O O O O

O O O O O O O O O

 O O O O O O O O

O O O O O O O O O

 O O O O O O O O

O O O O O O O O O

 

Does anyone know whether an AR*AR spatial model for each Tank in

ASREML could reasonably cope with such a pathological pot layout,

assuming the dataset is appropriately augmented with missing values

for the unused row-column combos? Would some other correlation

structure be more appropriate?

 

Thanks,

 

Alec Zwart
Received on Mon Aug 09 2007 - 16:44:58 EST

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