Re: NLSCON

[John W. Eaton]

On 18-Aug-2005, Bill Denney wrote:

| In addition to this, there are free solutions available from netlib like 
| nnls that could probably be rather easily added (I know that we already 
| have lsode).

The comments at the top of the NNLS subroutine say:

  C     GIVEN AN M BY N MATRIX, A, AND AN M-VECTOR, B,  COMPUTE AN
  C     N-VECTOR, X, THAT SOLVES THE LEAST SQUARES PROBLEM   
  C   
  C                      A * X = B  SUBJECT TO X .GE. 0 

so this is a very limited type op optimization.  We would like to have
a general NLP solver that is also free software.

jwe