CODEWITHSUNDEEP
matlab
Stratbomber
Stratbomber

Reputation: 3

Euler's-method,numerical methods

Currently I'm trying to learn about numerical methods, which involves a lot of matlab, there is an example in the book which I would love to use, but it simply wont work, it's looking like this:

function [t,y]=euler(inter,y0,n)
t(1)=inter(1); 
y(1)=y0;
h=(inter(2)-inter(1))/n;
for i=1:n
    t(i+1)=t(i)+h;
    y(i+1)=eulerstep(t(i),y(i),h);
end
plot(t,y)

function y=eulerstep(t,y,h)
    y=y+h*ydot(t,y);


function z=ydot(t,y)
    z=t*y+t.^3;

And I'm trying to run all of it with only the usage of euler([0 1],1,10); But when I try to run it, I get the warning; Too many input arguments.

Where did everything go wrong? And help at this point is greatly appreciated!

Upvotes: 0

Views: 138

Answers (1)

Sardar Usama
Sardar Usama

Reputation: 19689

euler is also a built-in function. Save your m-file with a different name, say euler11 and change the name of euler function to something else, say euler11. And then try again by calling it with euler11([0 1],1,10);

Making these changes gives me this output:

1

The lesson to learn or the good programming practice is to never name your variables/functions with the name of built-in ones.

Upvotes: 3

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