Get the first day of non-zero incidence across all variants and locations.
Usage
first_nonzero_incid(incid)
Arguments
- incid
a multidimensional array containing values of the incidence
for each time step (1st dimension), location (2nd dimension) and
pathogen/strain/variant (3rd dimension)
Details
For each variant, find the first day of non-zero incidence. The maximum of
these is the smallest possible point at which estimation can begin.