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FactorCopulaModel (version 0.1.1)

frank_beta2cpar: Frank: Blomqvist's beta to copula parameter

Description

Frank: Blomqvist's beta to copula parameter, vectorized

Usage

frank_beta2cpar(beta, cpar0=0,mxiter=20,eps=1.e-8,iprint=FALSE)

Value

vector of Frank copula parameters with the given betas

Arguments

beta

vector of Blomqvist's beta values, -1<beta<1

cpar0

starting point for Newton-Raphson iterations

mxiter

maximum number of iterations, default 20

eps

tolerance for convergence, default 1.e-8

iprint

print flag for iterations, default FALSE

Details

Solve equation to get cpar given Blomqvist's beta, Newton-Raphson iterations; vectorized input beta is OK, beta=0 fails

Examples

Run this code
b = seq(-0.2,0.5,0.1) 
frank_beta2cpar(b)
frank_beta2cpar(b,iprint=TRUE)

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