dplint.f
SUBROUTINE DPLINT (N, X, Y, C)
C***BEGIN PROLOGUE DPLINT
C***PURPOSE Produce the polynomial which interpolates a set of discrete
C data points.
C***LIBRARY SLATEC
C***CATEGORY E1B
C***TYPE DOUBLE PRECISION (POLINT-S, DPLINT-D)
C***KEYWORDS POLYNOMIAL INTERPOLATION
C***AUTHOR Huddleston, R. E., (SNLL)
C***DESCRIPTION
C
C Abstract
C Subroutine DPLINT is designed to produce the polynomial which
C interpolates the data (X(I),Y(I)), I=1,...,N. DPLINT sets up
C information in the array C which can be used by subroutine DPOLVL
C to evaluate the polynomial and its derivatives and by subroutine
C DPOLCF to produce the coefficients.
C
C Formal Parameters
C *** All TYPE REAL variables are DOUBLE PRECISION ***
C N - the number of data points (N .GE. 1)
C X - the array of abscissas (all of which must be distinct)
C Y - the array of ordinates
C C - an array of information used by subroutines
C ******* Dimensioning Information *******
C Arrays X,Y, and C must be dimensioned at least N in the calling
C program.
C
C***REFERENCES L. F. Shampine, S. M. Davenport and R. E. Huddleston,
C Curve fitting by polynomials in one variable, Report
C SLA-74-0270, Sandia Laboratories, June 1974.
C***ROUTINES CALLED XERMSG
C***REVISION HISTORY (YYMMDD)
C 740601 DATE WRITTEN
C 891006 Cosmetic changes to prologue. (WRB)
C 891006 REVISION DATE from Version 3.2
C 891214 Prologue converted to Version 4.0 format. (BAB)
C 900315 CALLs to XERROR changed to CALLs to XERMSG. (THJ)
C 920501 Reformatted the REFERENCES section. (WRB)
C***END PROLOGUE DPLINT