How are parallel with ode45

13 views (last 30 days)
omar A.alghafoor
omar A.alghafoor on 12 Nov 2020
Commented: omar A.alghafoor on 23 Nov 2020
Hi friends. i trying reduce execution time for my code ( system - differential equations ) by using parallel .
what are steps .... thanks in advance .
rows=1024;
cols=1024;
% interval=(rows*cols)/100;
interval=linspace(0,1,rows*cols);
[T,res]=ode45(@odefun,interval,[0.5;.4;.2]);%[0.5;.4;.2]);
% plot(T,res(:,1),T,res(:,2),T,res(:,3))
% legend('X','Y','Z')
k1=res(:,1);
k2=res(:,2);
k3=res(:,3);
function D=odefun(t,X)
x0=X(1);
y0=X(2);
z0=X(3);
a=35;
b=1.3;
c=3;
d=8;
e=10;
f=2;
g=5;
h=0.5;
x1=a*(y0-x0)+b*y0*z0;
y1=-c*x0*z0+d*y0+e*x0;
z1=f*x0*y0-g*z0+h*x0;
D=[x1;y1;z1];
end
  2 Comments
James Tursa
James Tursa on 12 Nov 2020
Edited: James Tursa on 12 Nov 2020
Numeric solvers such as ode45( ) rely on calculating the derivatives with the current state. This must be done in a sequential stepping process because the future estimated state at the next step depends on the estimated solution at the current step. You can't run any future steps in parallel because they depend on the estimated solution being known at that future time, and you don't have that.

Sign in to comment.

Answers (1)

Ameer Hamza
Ameer Hamza on 12 Nov 2020
MATLAB's ODE solvers do not support parallel processing capability.

Products


Release

R2019a

Community Treasure Hunt

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

Start Hunting!