Draw a sample by means of Tillé's elimination procedure
tille(pik, n, N, s, list, pmat)vector of first-order inclusion probabilities
sample size (excluding self-selecting units)
population size (excluding self-selecting units)
vector of length N, with 1s at the positions of self-selecting units
vector with positions of self selcting units
matrix of dimension $(N-n)xN, where each row has elimination probabilities for population units for one step of the procedure.