Use keywords as option values when it makes more sense than numerical values
Several options currently accept numerical values, which are not very meaningful nor informative. We could instead use keywords as values (but continue accepting the old numerical values for backward compatibility).
Candidate options for this change are:
solve_algo
stack_solve_algo
mode_compute
lik_init
kalman_algo
analytic_derivation_mode
mfs
plot_priors
For example, for solve_algo
, the integer value 0
could be replaced by the keyword fsolve
. And so on. The first step is obviously to decide which keywords to use for each numerical value.