Module DRATCH in IMSLM

• IMSLM Information

• Components
  • Documentation from ITL
  • Example from ITL

DRATCH

 
Compute a rational weighted Chebyshev approximation to a continuous function on
an interval.
 
Classes  :  K2 . Minimax (L-infinity) approximation
 
Type     : Fortran subroutine in IMSLM library.
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL DRATCH (F, PHI, WEIGHT, A, B, N, M, P, Q, ERROR)
 
Details  : Documentation Example
Sites    : (1) ITL
 

Implementation of DRATCH from IMSLM on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Double. (Single: RATCH)
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : Login to spruce.nist.gov and see ITL How-To for
                  information on how to setup your environment and link.
   Documentation: cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Documentation/dratch
   Example      : cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/dratch