Hello, I am trying to create a function that can take in a function and solve it using Runge-Kutta's method. For example, I should be able to input dy/dx = x+y , y(0) = 1 and get an answer from the funtion. I've been working with this equation for a while, I just cannnot figure out how to format this into a function. Here is what I have.
function [OutputX,OutputY] = FunctionBeta_Executor(h,x,y,FunctionA)
h=1.5; % step size
x = 0:h:3; % Calculates upto y(3)
y = zeros(1,length(x));
y(1) = 5; % initial condition
FunctionA = F_xy; % change the function as you desire
for i=1:(length(x)-1)
i=1:(length(x)-1) % calculation loop
k1 = F_xy(x(i),y(i));
k2 = F_xy(x(i)+0.5*h,y(i)+0.5*h*k1);
k3 = F_xy((x(i)+0.5*h),(y(i)+0.5*h*k2));
k4 = F_xy((x(i)+h),(y(i)+k_3*h));
y(i+1) = y(i) + (1/6)*(k1+2*k2+2*k3+k4)*h; % main equation
end
end
% For example, FunctionA might be dy/dx = x+y , with inital conditions y(0)=1.
Best Answer