src/nnls.f
From the public domain source code distributed with the book
Lawson CL, Hanson RJ (1995). Solving Least Squares
Problems. Classics in Applied Mathematics. SIAM, Philadelphia, and
downloaded from http://www.netlib.org/lawson-hanson/
src/nnnpls.f
From the public domain source code distributed with the book
Lawson CL, Hanson RJ (1995). Solving Least Squares
Problems. Classics in Applied Mathematics. SIAM, Philadelphia, and
downloaded from http://www.netlib.org/lawson-hanson/
with trivial modifications to allow for non-positive constraints in
combination with non-negative constraints.