Hi again. I have a question about covariance matrices (again)
Suppose we have an exponential model with c=2 and a=3.
Then for
c_{ij} = c exp(-h_{ij}/a),
when i=j,
we should have:
c_{ii} = 2 exp(0) = 2
But shouldn't c_{ii} = 1, please?
Thanks,
Erin
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