Find the approximate beginning times of waves given times of peaks. This is based on local maxima of \(R_t\).
find_starts(rt_values, peaks_x, search_range)A list containing the detected start times of waves, as scalars.
A vector containing rt values for each time point.
Time points of peaks based on daily cases (one for each wave).
The range of data points to go through for filtering invalid beginnings (a vector).
Note: This is provided for convenience only, and is not meant to replace an analyst's determination of wave bounds.