phi, phi.inv | R Documentation |
The Archimedean generator function and its inverse.
phi(x, theta, type) phi.inv(x, theta, type)
x |
a scalar, vector or matrix at which the function is evaluated. The support of the functions has to be taken into account, i.e. x \in [0, ∞] for the generator function and x \in [0, 1] for its inverse. |
theta |
the feasible copula parameter, i.e. θ \in [1, ∞) for the Gumbel and Joe family, θ \in (0, ∞) for the Clayton and Frank family and θ \in [0, 1) for the Ali-Mikhail-Haq family. |
type |
select between the following integer numbers for specifying the
|
x = runif(100, min = 0, max = 100) phi(x, theta = 1.2, type = 1) # do not run # phi(x, theta = 0.8, type = 1) # In phi(x, theta = 0.8, type = 1) : theta >= 1 is required.
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