Friday, February 8, 2008

Matlab Tutorial classes begin

Yesterday Matlab tutorial classes began. We learned the basics of solving differential equations and integral functions. Solving differential and integral function with matlab quite difficult at the very beginning but I try it independently.


Some .m files which are written by me. Do not evaluate me‼‼‼ this is only a beginning……..

x = 0:0.1:10;

y= length(x);

for I=1:y;

m(I)= [x(end-I)];

end

m;



Second Problem

Solving integral from 0 to 1 ,ydx where y=x

x = linspace(0,1,10);

h = 0.01;

a=0;

b=1;

n= (a-b)/h;

y(1)=1;

x(1)=0;

for I = 1:n;

x(I+1)= x(I)+h;

y(I+1)= y(I)+ h*x(I);

end

[x,y]

plot(x,y);

This .m file did not run, it gives a error message

Are there any MATLAB experts? Help me via comments

3 comments:

rt said...

I'm not a matlab expert, but don't mind looking at your problem, if you still haven't solved it.

I think your code got corrupted when you posted it. Is it one file or two? Where does each file start / end, and what's with the "?

Thushara Subasinghe said...

Thank you rt,

I make it correct.

Miyuru said...

There was only a small mistake..
It should be
n= (b-a)/h;

not
n= (a-b)/h;

When u use it as n= (a-b)/h; it will give minus value to n and loop will assign minus values to array index..Ask, if u have any more questions..

x = linspace(0,1,10);

h = 0.01;

a=0;

b=1;

n= (b-a)/h;

y(1)=1;

x(1)=0;

for I = 1:n;

x(I+1)= x(I)+h;

y(I+1)= y(I)+ h*x(I);

end

[x,y]

plot(x,y);

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