Description Usage Arguments Value Examples
View source: R/Functions_Cross_Dep.R
Take a k-order polynomial approximation of a bivariate φ(xi,xj). The expansion excludes terms that are solely in the first variable term because coefficients on them are not identified.
1 | polyexp(xi, xj, k)
|
xi |
first variable term |
xj |
second variable term |
k |
order of polynomial approximation |
vector of length k(k+1)/2
1 2 |
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