Algorithm 863: L2WPMA: A Fortran 77 subroutine for weighted least squares piecewise monotonic data fitting

Citation:

Demetriou IC. Algorithm 863: L2WPMA: A Fortran 77 subroutine for weighted least squares piecewise monotonic data fitting. ACM Transactions on Mathematical Software. 2007;Vol. 33(1):1-19.