need some help with linear algebra

[mchammer187]

anyone know how to solve the least squares problem when u have a noninvertible matrix

i know how to do it if all the vectors are linearly independent

problem is Ax = b (^ T = transpose)

A = [ 1 2 ] b (3 2 1) ^ T
| 2 4 |
[-1 -2 ]

the answer is { ( 1- 2&, &)^T where & = any real


A^T * A = non invertible

i really need some help cuz i am studying for my test which is in 12.5 hrs

 

[GermyBoy]

Sorry man, that really sucks. Wish I could help you out, but I forgot all that jazz.

 

[maziwanka]

the matrix A only has one equation basically. its the vector (1 2)

 

[maziwanka]

oh and ur vector b is wrong too. you wrote the problem wrong.

 

[mchammer187]

vector b is right i figured it out