Assignment 2

Has anyone busy with assignment 2, or has finished assignment 2?

I am in the middle of it, and am struggling quite a bit with a few of the questions. Is there anyone else that is struggling, that maybe wants to compare answers and throw some idea's around?..

I will be starting soon. Ask your questions in the mean time so that I (or anyone else for that matter) know what to look out for when I'm reading and can then help you if I can.

Sorry for the long break between my posting - have been busy with other work.

My main question at the moment, is around Question 1, f and g. How do you get the equations to be diagonally dominant? Or do we just run the algorithm on the equations that are not diagonally dominant?

I am sure I will have other questions as I review my answers, some of which I am not convinced that I have done correctly..

Thanks for the input.

It is not a requirement for the matrix to be diagonally dominant. It will just make the method converge to a solution faster if it was.

Henry Wrote:
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> It is not a requirement for the matrix to be
> diagonally dominant. It will just make the method
> converge to a solution faster if it was.

Indeed - but they asked for only 3 iterations. And after those 3 iterations, with the matrix not diagonally dominant, I get no-where near the "correct" results that satisfy the equation. It is probably correct that after the 3 iterations a sufficient solution is not reached - it just had me concerned that I had missed something.
Thanks for the input

Word to the wise.... some of the problems will not converge. We had the same one last year and apparently the year before.

I'm just struggling with 2 questions:

- Question 3) Anybody know where it's stated in the text book about how to do question 3. I can only find Newton's method with regard to approximating zeros. And what does "in the maximum-magnitude norm" mean? I know what that norm is, but how do I use it with Newton's method???

-Question 6) How big must the Coefficient matrix be, is it 2x2 or just 1 value? If it's 2x2 then the "anwser vector" that uses divided differences should then be 2x1, what values go in the botom part of that vector as there are no x3 values???

Or am I just really complicating the issue?

Please help!!

Why do I get the idea that most people do this module twice to pass.