monet object is created with greedy,
  dualgreedy, interchange or
  maxentropy.The object only contains indices of the rows/columns of the given covariance matrix $A$.
Indices of fixed stations start with 1, indices of fixed and eligible stations are not mixed, i.e. the last $ne$ stations are the eligible ones, the first $nf$ are the fixed ones.
The solution contains the indices counted absolute within all stations.
"greedy", "dual greedy",
    "interchange" (heuristics) or "maxentropy" (exact
    solution). 
  monet.selected to convert into reusable index vector.print.monet