Change start year of the data file
change_startyear(dat_list, firstyear = NULL)A Stock Synthesis data list object as read in from
SS_readdat.
Be sure to correctly specify which section of the data file you want
to work with when reading it in using the section argument.
Where, section = 1 reads in the input values used to run the model
and section = 2 reads in the expected values generated given all the
input to the OM. section = 3 is not used within ss3sim, but this
section provides bootstrapped data sets that have been sampled internally
within SS.
An integer specifying the year to start fitting the model.
The default is NULL, which will look up the first year
with non-zero catch or non-zero catch-per-unit-effort data in dat_list.
A r4ss::SS_readdat() list with an augmented start year.