Collect a Metropolis-Hastings trace into flat vectors/lists

Drop-in, vectorized replacement for the original FinalMH(). The original also computed a `loglikelihood` vector that was never included in its return value (dead code); this version omits that computation.

Usage

FinalMH(bcp_new)

Arguments

bcp_new

the `cps_list` element of MHsearch's output.

Value

A list of parallel vectors/lists extracted from the trace: `r`, `u`, `v`, `this_cp`, `seg_vel`, `seg_time`, `eta`, `criterion_score`, `RSS`, `num_cp`, `r_prop`.