Effacer les filtres
Effacer les filtres

Why is my error not exactly 0

3 vues (au cours des 30 derniers jours)
Nicholas Zhao
Nicholas Zhao le 13 Avr 2024
I wrote a very simple upwind difference scheme for the equation with , but for some reason the error is not exactly 0.
%u_t+u_x=0
space=[0.01,0.005,0.0025,0.00125];
error=zeros(size(space));
for j=1:size(space,2)
dx=space(j);
dt=dx;
u=sin(0:dx:1);
n=size(u,2);
T=1/dt;
for i=1:1
ul=[sin(-dx-dt*(i-1)),u(1:(n-1))];
u=(1-dt/dx)*u+ul*dt/dx;
end
error(j)=norm(u-sin((0:dx:1)-dt),1)/n;
end

Réponses (1)

Image Analyst
Image Analyst le 13 Avr 2024
error is a built-in function. You must not use it as a name for your variable.
Does the FAQ answer your question?

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by