Description Usage Arguments Value
Utility function to compute onset week based on a trajectory of incidence values
1 2 | get_onset_week(incidence_trajectory, baseline, onset_length,
first_season_week = 31, weeks_in_first_season_year)
|
incidence_trajectory |
a numeric vector with incidence for each time point in a season |
baseline |
the threshold that incidence must cross to count as an onset |
onset_length |
number of consecutive time points that incidence must exceed the baseline threshold in order to count as the season onset |
first_season_week |
number of weeks in year corresponding to the first week in the season. For example, our code takes this value to be 31: a new influenza season starts on the 31st week of each year. |
weeks_in_first_season_year |
How many MMWR weeks are in the first year of the season? For example, in the 2000/2001 season, the first year is 2000. There were 52 MMWR weeks in 2000. |
the smallest index i such that every entry of incidence_trajectory[seq(from = i, length = onset_length)] is >= baseline, if such an index exists. Otherwise, the character vector "none"
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