Bootstrap for the bivariate copula models
bootstrapfun(Q, family, tau, n, df, max_iter, eps, HMM)
Weights vector (1 x reg or component);
'gaussian' , 't' , 'clayton' , 'frank' , 'gumbel'
Kendall's rank correlation
number of simulated vectors
precision (e.g 0.00001);
1 (if HMM) , 0 (if mixture);
vector of degree of freedom (d x 1), only for the Student copula.
number of bootstrap (e.g 1000);