How can i implement u1(i)- u2(i) in the while loop instead of u(i) and plot the graph against that too instead of u

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Advait Sinha 2019-6-24

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https://ww2.mathworks.cn/matlabcentral/answers/468648-how-can-i-implement-u1-i-u2-i-in-the-while-loop-instead-of-u-i-and-plot-the-graph-against-that-t

评论： Advait Sinha 2019-6-24

close all;
dt = 0.464;%time step
u=1;
k=0.12;
m=2.21;%initial parameters
v=1;
a=1.4;
tend=100;
t=0;
i=1
while t < tend-2*dt
    vh=v(i)-dt*k*u(i)/ (2*m);
    u(i+1)= u(i)+ dt*vh;
    a(i+1)= -k*u(i+1)/2;
    v(i+1)= vh + dt*a(i+1)/2;
    i = i+1;
    t = t + dt
end
plot(linspace(0,tend,tend/dt),u);
    

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Jan 2019-6-24

There is no u1 or u2 in your code. I cannot guess, how you want to implement it, if you do not explain the details.

Advait Sinha 2019-6-24

so i want to replace the u with u1 and u2. and then in the while loop instead of having vh = v(i)-dt*k*u(i)/(2*m) , I want to have vh = v(i) - dt*k*(u1(i)-u2(i))/(2*m) followed by the necessary changes

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