ssfrr

function unwrap(v, inplace=false)
  # currently assuming an array
  unwrapped = inplace ? v : copy(v)
  for i in 2:length(v)
    while unwrapped[i] - unwrapped[i-1] >= pi
      unwrapped[i] -= 2pi
    end
    while unwrapped[i] - unwrapped[i-1] <= -pi
      unwrapped[i] += 2pi
    end