Least Squares Factorization Classes
The Least Squares Factorization Classes allow you to find the best solution to an over-determined or under-determined system of equations. These classes are contained in Table 6.
Table 6 – The Least Squares Factorization Classes 
Class Name
Type
Header File
Encapsulates a factorization object using a Ch factorization.
rw/lapack/lsch.h
Encapsulates a factorization object using a QR factorization.
rw/lapack/lsqr.h
Encapsulates a factorization object using a SV factorization.
rw/lapack/lssv.h