Writing an m-file with ODE45 for a projectile problem

[faust9]

ARGH! Matlab trouble!

Ok, I'm having a big problem as described here: https://www.physicsforums.com/showthread.php?t=46950

Basically, I've never used MATLAB and was given an assignment on friday which requires that I use matlab. First off, could someone please help me with my projectile problem?

Next, how the heck does one write an m-file. I know how to open the editor and the simple stuff but actually using ODE45 is killing me. The help file is about as useful as a man file--good for pro's lousy for novices.

Any help would be greatly appreciated.

 

[Goalie_Ca]

If you haven't already figured it out, there's nothing much to an .m file. Since i do not warez matlab, I'm using vim (a text editor) and octave. Basically what goes in a .m file is something like this

function returnValue = f(x)
     returnValue = 2*x^2 + 3*x+2
end

format long %for displaying more digits
result1 = f(4)
results = zeros(1,10); %creates a vector full of zeros, 10 big
results(1) =  f(6);
results(5)  = f(24);