somthing wrong with loop in my code

for i=0:length(t)

    if(i>=0 && i<0.15)
        disp('Steg1')
        v1=velocity(v0,a,t,t0);

    else  
        t0=0.15;
        v0=v1;
        a=-g;
        display(a)
        v2=v1;
        display (v2)
        while(v2>0)

        t1=t0+dt;
        display(t1)
        v2=Velo(v0,a,t1)
        end
end

i defined v2=v1, but loop starts from zero and it prints out v2 many times on the screen, what is wrong with my code?

[Image Analyst]

Well, let's see. We don't have Velo, we don't have velocity, and we don't have t or v1. So how can we debug it? And it prints out v2 to the command line because you left off the semicolon when you assign a value to it. So why do you say something is wrong with it?

[per isakson]

What do want the loop to print?

[benjamin ma]

i defined function for velocity and velo, and here is just a bbit of code not the whole code, FYI, t=0:0.001:0.15 and i plot v1, but problem is i dont know t for next step, then i add t1=t0+dt (dt=0.001). Now i want to plot v2 so i put it in a while loop but it just give me one answer(v2= 0.312), it seems it does not go to the loop. if you need the whole code i can zip the functions and script files, then you can have look?

[benjamin ma]

as i said i plot v1 succefully, now i need to plot v2 from where v1 finishes!

[Image Analyst]

Like I said, we don't know what t is so we don't know what length(t) is, and this is required before the loop can start. Plus, why didn't you attach Velo and velocity even after I said that is what is lacking for us to help you debug this?

[benjamin ma]

Thank you Buddy for your help, here is the zip file