dpseg segment break-pointsBacktracing segment borders from the imax vector of a
dpseg recursion. This function is implemented more
efficiently in Rcpp; the R code is kept for documentation,
benchmarking and development.
backtrace_r(imax, jumps = 0)integer vector of segment borders as returned by
dpseg recursion functions
allwo discontinuous jumps: move 1 index position back, only for \(S_{i-1} + score(i,j)\)
an integer vector of segment ends