Thread Subject: circulant matrix project

i need to implement a matlab function

function [a y] = project12(a1,x)

a1 and x are vectors of the same length.the function returns a circulant matrix a with a1 as its first row and the vector y=x(I+ax'xa^-1)^-1. for example:

>>a1 = [ 1 4 2 8];
>>x=[1 2 3 4];
>> [a y] = project12(a1,x)

a= 1 4 2 8
      8 1 4 2
      2 8 1 4
      4 2 8 1

y= -5.0295 2.7632 3.8396 0.6418

this project is due tomorrow and Me nor my partner has any idea of where to start or what to do. Any help would be greatly appreciated.

I feel for you, but I wonder why you left your project till the last minute. Perhaps if you had started earlier and come here showing folks where you are stuck,...

"Matt Fig" <spamanon@yahoo.com> wrote in message <hed4ff$64r$1@fred.mathworks.com>...
> I feel for you, but I wonder why you left your project till the last minute. Perhaps if you had started earlier and come here showing folks where you are stuck,...


just started because I have been swamped studying for a differential equations test and a statics test. and the thing about it... our professor does not help whatsoever on projects. Even if you have no clue where to start he will not even point you in the right direction. so.... yeah.... stuck is the word.... and if you had to sit through 3 hours of wrambling and not knowing what he is doing or saying (foreign professor) you would most likely be stuck as well. this semester is my first crack at matlab and having a bad teacher does not help. but thanks for your input.

"Matthew " <m.humphrey09@comcast.net> wrote in message <hed4qr$rdb$1@fred.mathworks.com>...
> "Matt Fig" <spamanon@yahoo.com> wrote in message <hed4ff$64r$1@fred.mathworks.com>...
> > I feel for you, but I wonder why you left your project till the last minute. Perhaps if you had started earlier and come here showing folks where you are stuck,...
>
>
> just started because I have been swamped studying for a differential equations test and a statics test. and the thing about it... our professor does not help whatsoever on projects. Even if you have no clue where to start he will not even point you in the right direction. so.... yeah.... stuck is the word.... and if you had to sit through 3 hours of wrambling and not knowing what he is doing or saying (foreign professor) you would most likely be stuck as well. this semester is my first crack at matlab and having a bad teacher does not help. but thanks for your input.

Yeah, life sucks.

But people on this site are not going to do your
homework for you. Most of us have suffered with
our share of bad professors. You learn to do your
homework anyway. to learn the subject. You find
a way, that does not involve someone else doing
your work for you.

Maybe you find a group of other students who
are in the same class, and spend some time
reviewing your class notes. I did that for a couple
of classes. We would spend 20 minutes or so after
class every day, sorting out our notes, trying to
figure what was meant by something our professor
said. We would spend a few minutes just working
out what the homework assignment was for that
week.

A nice thing is, all of the students in our group
benefited from doing this. And in hindsight, there
was at least one class I took where I really wish I
had done exactly as I am suggesting that you do.

So good luck. And stop asking others to do your
work for you. It will not help you in the long run.
Get your work started on time. Learn to manage
the various assignments together, so that all of it
gets done on time. This is a good lesson for your
future life anyway.

John

"Matthew " <m.humphrey09@comcast.net> wrote in message <hed3jc$c5v$1@fred.mathworks.com>...
> i need to implement a matlab function
>
> function [a y] = project12(a1,x)
>
> a1 and x are vectors of the same length.the function returns a circulant matrix a with a1 as its first row and the vector y=x(I+ax'xa^-1)^-1. for example:
>
> >>a1 = [ 1 4 2 8];
> >>x=[1 2 3 4];
> >> [a y] = project12(a1,x)
>
> a= 1 4 2 8
> 8 1 4 2
> 2 8 1 4
> 4 2 8 1
>
> y= -5.0295 2.7632 3.8396 0.6418
>
> this project is due tomorrow and Me nor my partner has any idea of where to start or what to do. Any help would be greatly appreciated.
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