eval_dates              Evaluate completeness of dates
eval_sign               Evaluate the sign of data
find_gaps               Identify gaps in a sequence of dates
local_x_index           Find indexed local minima/maxima
qw_stats                Calculate summary statistics
rollmean_date           Rolling mean of values indexed by date
streamdat               Stream Discharge and Specific Conductivity
subsample               Convert a daily record to discrete
subsample_routine       Convert a daily record to periodic discrete
summarize_seasons       Seasonal and monthly value ranking
thresholds              Find thresholds for each season
