create reference functions for control systems

func_ref.py

def cria_func(x,x2,A1,A2,intervalo):
    passo = ((x-x2))
    a = (A1-A2)/passo
    b = A2-a*x2
    vet = []
    
    for k in np.arange(x,x2,intervalo):
        vet.append(a*(k)+b)
    return vet