### rank-defficient under-determined system

Posted:

**Tue Nov 29, 2011 12:43 pm**I am trying to solve an under-determined system of equation (more variables than equations)

Routines SGELS/DGELS assumes that the matrix is full-rank, what happens if the A matrix is rank defficient?

Will it thow any erros or will it still proceed solving the linear system?

Thanks

CNY

Routines SGELS/DGELS assumes that the matrix is full-rank, what happens if the A matrix is rank defficient?

Will it thow any erros or will it still proceed solving the linear system?

Thanks

CNY