How to solve a differential equation with non-constant coefficients
6 次查看(过去 30 天)
显示 更早的评论
Hi all
I have equation like this dy/dx = a(x)*y + b
where : a(x) is non constant (a=1/x) and b is a vector (10000 rows)
how can I solve this equation using matlab !!
Someone answer me plz
0 个评论
回答(3 个)
Torsten
2017-6-8
Take a look at the example
ODE with Time-Dependent Terms
under
https://de.mathworks.com/help/matlab/ref/ode45.html
Best wishes
Torsten.
4 个评论
Torsten
2017-6-13
So you want to solve the ODE
y'=y/x-sqrt(Bx^2+By^2+Bz^2)
for all combinations (Bx,By,Bz) from your loaded arrays ?
Then use a loop over the length of Bx:
a = @(x) 1/x;
xdomain = linspace(1,100,10);
y0=1;
%b = rand(10000,1);% aléatoire
load ('Bx');
load ('By');
load ('Bz');
for i=1:numel(Bx)
f=@(x,y) a(x)*y-sqrt(Bx(i)^2+By(i)^2+Bz(i)^2);
[x,y]=ode45(f,xdomain,y0);
yvec(i,:)=y(:);
end
Best wishes
Torsten.
Francisco Rosales
2020-5-15
Hi all
I have equation like this Az'(t) = Bz(t)+ b
how can I solve this equation using matlab !!
Someone answer me plz
Thaks
Grace
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Scope Variables and Generate Names 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!