Description Usage Arguments Value
Computes a second partial derivative of a smooth supersaturated model at a design point. Used in the computation of distance measures based on local smoothness.
1 | partial.deriv.ssm(indices, ssm)
|
indices |
A vector of integers specifying the two variables by which we take the partial derivatives with respect to. |
ssm |
An SSM object. |
A single column vector containing the second partial derivatives with respect to the requested variables, evaluated at all design points.
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