Compute the states for a model in a cohort of humans / hosts
as it ages, up to age years of age
Arguments
- xds_obj
an xds
object
- bday
the cohort birthday
- A
the maximum age to compute (in years)
- da
the output interval (age, in days)
Details
This method substitutes age for time: a model
is solved with respect to age :
where the daily EIR is computed by a trace function with four elements:
or eir
, the mean daily EIR,
or F_age,
a function of age
or F_season,
a function of time of year
or F_trend,
a function describing a trend
For a cohort born on day ,
the function creates a mesh on age / time, where time and age
are related by the formula:
and the trace function is:
The output is returned as xds_obj$outputs$cohort