How to solve exponential equation in Matlab?

i need to to solve the equation Vr = Vs[1-exp((-R*t)/L)], for t using ''solve'' function, can't do it, there is error says ''can't find an implici solution'', Can anyone help plz.

Answer 1

[Star Strider]

The correct syntax is important with the Symbolic Math Toolbox. You have to define your equation as an expression and assign that to a different variable (here ‘Eq1’).

The Code:

syms L R t Vr Vs
Eq1 = Vr == Vs*(1-exp((-R*t)/L));
t_sol = solve(Eq1, t)

t_sol =
-(L*log(1 - Vr/Vs))/R

[Mudasir Buledi]

Thank you!

[Star Strider]

As always, my pleasure!