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My input method isn't working?

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Andrew Davies
Andrew Davies on 18 May 2014
Commented: Andrew Davies on 19 May 2014
Something is going wrong. Here is the code i'm trying to get to work
%function dLdt = Lorentz(t,x,y,z)
%s = 10
%b = 8/3
%x = L(1);
%y = L(2);
%z = L(3);
%dx = s*(y - x)
%dy = r*x - y - x*z
%dz = x*y - b*z
%dLdt = zeros(3,2,1);
%dLdt(1)=dx;
%dLdt(2)=dy;
%dLdt(3)=dz;
That is the one .m file i made. The second one is simply
%[t,x,y,z]=ode45('pro1',0:0.001:1,[1 1 1]);
%plot3(L(:,1),L(:,2),L(:,3));
Now it says 'Undefined function or method 'L' for input arguments of type 'double'. I'm pretty sure my syntax is completely retarded somewhere. This is why i'm asking you guys :)
pro1 is the .m file

Answers (2)

Image Analyst
Image Analyst on 18 May 2014
Why do you think L should have any value? Did L come from anywhere? No. It was not passed in through the input argument list, nor is it a global variable, nor did you call getappdata() or assign it or initialize it. So how is L supposed to have any value?
  3 Comments
Image Analyst
Image Analyst on 19 May 2014
Attach pro1.m so we can try to fix it.
Andrew Davies
Andrew Davies on 19 May 2014
pro1.m is the first section of code i wrote up

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Marc
Marc on 18 May 2014
I think you want to define your function Lorentz(t,L).
Also, in your call to Ode45, I think you want to indicate Lorentz as the function and instead of x,y,z in the output, replace with L.
  1 Comment
Andrew Davies
Andrew Davies on 19 May 2014
So now it's saying there aren't enough input arguments

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