I'm a newbie to all things programming, and have to write a program implementing the Euler method to approximate an ODE.(adsbygoogle = window.adsbygoogle || []).push({});

Anyways, the program works but when I use the function I wrote I get an extra matrix of zeroes above the desired output, which I don't understand as I have suppressed the output of the zero matrix with a semi-colon - the matrix is Eulerpoints. Here's the source code:

function [Eulerpoints] = Eulermethod(x0,y0,xn,steps)

%EULERMETHOD - this function will approximate y by the Euler method.

% EULERMETHOD(x0,y0,xn,steps) will return a list of points that

% approximate y in the interval [x0,xn] given our initial co-ordinate

% (x0,y0) and the number of steps.

Eulerpoints=zeros(steps+1,2);

start = 2;

finish = steps+1;

h=(xn-x0)/steps;

Eulerpoints(1,1) = x0, Eulerpoints(1,2) = y0;

fprintf(' n xn Yn\n 0 %2g %2g\n',x0,y0)

for I= start:finish

Eulerpoints(I,1) = x0 +h*(I-1);

Eulerpoints(I,2) = Eulerpoints(I-1,2) + h*(-2*Eulerpoints(I-1,2) - 0.25*Eulerpoints(I-1,1)*Eulerpoints(I-1,1) + 0.125); %% This line contains the ODE, which can be adjusted for a different equation.

fprintf('%3g %4g %6g\n',I-1,Eulerpoints(I,1),Eulerpoints(I,2))

end

%

end

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# MATLAB function printing extra matrix?

Loading...

Similar Threads for MATLAB function printing |
---|

MATLAB MATLAB: forces acting on an object |

MATLAB Matlab histogram |

MATLAB Sovling Bernoulli's differential equation in matlab? |

MATLAB Matlab-like software |

MATLAB Matlab data into bins |

**Physics Forums | Science Articles, Homework Help, Discussion**