Question

could someone please help me with my matlab code

Answer 1

I feel your pain. I had to do matlab last semester T_T
oh oh! I know who can help >:D
@dan815

Answer 2

ok thanks! @UsukiDoll

Answer 3

could u help me please @dan815

Answer 4

What's the problem? Syntax or logic?

You are trying to pick out statistics from you reduced matrix - are you not getting the values you want?

Answer 5

In line 4 of your code -- what does pivot=[pA] do? There is not matrix pA defined

Answer 6

no yes my code is fine and works well i just have to do something else with it and i dont knw how to do it

Answer 7

let me show you

Answer 8

ok

Answer 9

my original code that works does not have pivot=[pA] nor xp=zeros;

Answer 10

it just has pivot=[ ]

Answer 11

So initializing pivot makes sense like that but I don't see where you are using xp in your code. I would expect pivot=[pA] to fail.

Answer 12

this is what my answer is supposed to be

Answer 13

so then how to i initialize xp to be the zero column vector ?

Answer 14

zeros(m,n) should do it because the particular solutions won't span more than n columns or m rows

Answer 15

oh ok thanks

Answer 16

Is that it?

Answer 17

yes the rest seems pretty straight forward right?

Answer 18

It does if you understand pivots, free variables, particular solutions, the null space, rank etc, and of course Matlab

Answer 19

ok its just that im new to this and struggle quite a bit

Answer 20

Have you taken a Linear Algebra class where you studied column spaces and free variables, where n > m ?

Answer 21

yes i did

Answer 22

then you have a good leg up then - sounds like a good exercise - let me know if I can help any -- I loved Matlab -- used it for my thesis in EE a while ago

Answer 23

I use Octave now -- open source Matlab

Answer 24

oh ok i will thanks a lot for your help!!

Answer 25

You're welcome.

Good luck my friend!

Answer 26

loved matlab. But i moved on to c++ tho. SOrry :(