While solving boundary value problems (using bvp4c) the graph is plotted as the command ""plot (x,BS(1,:))"" but if I want the graph between x and y and not x and boundary solution (BS) what should I do ?

This is the matlab script :

init = bvpinit(linspace(-1,1,20),[0 0]);
sol=bvp4c(@rhs_bvp,@bc_bvp,init);
x = linspace(-1,1,20);
BS=deval(sol,x);
plot(x,BS(1,:));

I do not understand the purpose of deval, also the graph i want to plot is between x and y not x and boundary solutions (bs).

How can i do that ?

Answer 1

[infinity]

Hello,

You might simply plot x and y like this

plot(sol.x, sol.y, '-o')

Several examples of how to use bvp4 and deval can be seen here

https://www.mathworks.com/help/matlab/ref/bvp4c.html

https://www.mathworks.com/help/matlab/ref/deval.html#bu7i1lh