pyperfectforesight.lead_lag_incidence

pyperfectforesight.lead_lag_incidence(equations, known_vars=None)

Detect which variables appear at which time lags in the equations

Parameters:

equationslist

List of sympy equations

known_varsset, optional

Set of declared variable base names (vars_dyn + vars_exo + vars_aux). When provided, only symbols whose base name is in known_vars are recorded, preventing parameters like rho_1 from appearing in the incidence table. When None, every parseable name_<int> symbol is included (legacy behaviour).

Returns:

dict : Dictionary mapping variable names to sets of lags