Solver_UniSecond_func function

Solver of univariate second-order differential equation

Solver_UniSecond_func(userdata, var_model, guess, method)

Arguments

• userdata: a data frame containing all model variables. The "time" column must be included.
• var_model: a dataframe containing equations
• guess: a list or a string. Guess the coefficients or initial values.
• method: a list or a string. The available options are 'Nelder-Mead','L-BFGS-B','SANN' and 'BFGS'.

Returns

a list