How can I set a condition that Vw = 0 when t = 0 in this code

How can I set a condition that Vw = 0 when t = 0 in this code

vib = 10; %
Vw = 0.1;  %
t = [0 5 10 15 ];
Ta = [5]; %  
Vb = vib + Vw*exp(t/Ta);  

 so that plot(t,Vb) starts at 10  and not 10 + exp(0)

Any help will be appreciated!

Answer 1

[Christiaan]

Dear Clement,

In your function Vb = vib + Vw*exp(t/Ta), for t=0, Vb = vib + 0.1=10.1; There are many solutions if you like to set the Vb at 10. Here you can find two possible solutions:

Option 1

   clc;clear all;close all

    vib = 10; Vw = 0.1; 
    t = [0 5 10 15 ];
    Ta = [5]; 

    for i=1:length(t)
    if t(i)==0
        Vb(i) = 10;
    else
        Vb(i) = vib + Vw*exp(t(i)/Ta);
    end
    end

    plot(t,Vb)

Option 2

clc;clear all;close all

vib = 10; Vw = 0.1; 
t = [0 5 10 15 ];
Ta = [5]; 

Vb = vib + Vw*exp(t/Ta);
Vb = Vb - Vw;

plot(t,Vb)

Kind regards, Christiaan

[Clement]

Hi Christian

Thanks for the help. It really did solve my problems.

Thanks