trivial — L module

The trivial module outputs the emergence rate of adult mosquitoes by calling a trace function, $$F_\alpha(t) = \Lambda \times F_S(t, V_s) \times F_T(t, V_t) \times F_K(t, V_k)$$ where

• \(\Lambda\) is the mean daily emergence rate of adult mosquitoes

• \(F_S(t,V_s)\) or F_season is a seasonal pattern function

• \(F_T(t,V_t)\) or F_trend is a trend pattern function

• \(F_K(t,V_k)\) or F_shock is a perturbation function

The variables \(V_s\), \(V_t\), and \(V_t\) are called by get_variables, which dispatches on the class of season_par or trend_par or shock_par.

Parameters

Lambda

the mean daily emergence rate

F_season

a seasonal pattern function, \({F_S(t,V_s)}\)

F_trend

a trend function, \(F_T(t,V_t)\)

F_shock

a shock function, \(F_K(t,V_k)\)

season_par

dispatches get_variables to get \(V_s\)

trend_par

dispatches get_variables to get \(V_t\)

shock_par

dispatches get_variables to get \(V_k\)

The default values are F_season=F_trend=F_shock=F_one and the classes of the objects season_par and trend_par and shock_par are all list

Get

• get_L_pars — the trivial method returns all the parameters

• get_mean_forcing — get Lambda

• get_season — returns season_par

• get_trend — returns trend_par

• get_shock — returns shock_par

Change

• change_L_pars — change parameters by name

• change_mean_forcing — changes Lambda

• change_season — changes elements of season_par

• change_trend — changes elements of trend_par

• change_shock — changes elements of shock_par

Notes

1. The module has no state variables.

2. The size of an object saved by saveRDS balloons if it saves a function, so saveXDS function strips the functions and readRDS remakes the function from the stored parameters. F_season, F_trend, and F_shock can be set up manually by passing any user defined function. If so, the user should use saveRDS and readRDS rather than saveXDS and readXDS

3. Setup expects that membership= c(1:nPatches), but any membership vector works.