+++ /dev/null
-*
-* $Id$
-*
-* $Log$
-* Revision 1.1.1.1 1996/04/01 15:02:25 mclareni
-* Mathlib gen
-*
-*
-#include "gen/pilot.h"
- FUNCTION TRISUM(X,A,N,B,M,IOP)
-C
-C PURPOSE = TO COMPUTE THE SUM OF THE TRIGONOMETRIC SERIES
-C
-C TRISUM = A(1)/2+A(2)*COS(X)+....................A(N)*COS((N-1)*X)
-C +B(1)*SIN(X)+....................B(M)*SIN(M*X)
-C
-C PARAMETERS
-C
-C X = FUNCTION ARGUMENT
-C A = ARRAY DIMENSIONED A(N),KEEPING THE COEFFICIENTS FOR THE
-C COSINE TERMS
-C N = THE NUMBER OF COEFFICIENTS IN THE COSINE SERIE
-C B = ARRAY DIMENSIONED B(M),KEEPING THE COEFFICIENTS FOR THE
-C SINE TERMS
-C M = THE NUMBER OF COEFFICIENTS IN THE SINE SERIE
-C IOP = OPTION NUMBER , IOP = 1 , THE GENERAL CASE
-C IOP = 2 , THE EVEN CASE
-C IOP = 3 , THE ODD CASE
-C
- DIMENSION A(N) , B(M)
-C
-C*UL 1000 COF=2.*COS(X)
- COF=2.*COS(X)
- TRISUM=0.
-C
- IF (IOP.EQ.3) GO TO 1030
-C
-C COMPUTE SUM OF COSINE TERMS
-C
- A2 =0.
- A1 =A2
- A0 =A(N)
-C
- IF (N.EQ.1) GO TO 1020
-C
- NN=N-1
- DO 1010 K=1,NN
- A2=A1
- A1=A0
- INDEX=NN+1-K
- A0=A(INDEX)+COF*A1-A2
- 1010 CONTINUE
-C
- 1020 TRISUM=.5*(A0-A2)
-C
- 1030 IF (IOP.EQ.2) RETURN
-C
-C COMPUTE SUM OF SINUS TERMS
-C
- A2 =0.
- A1 =A2
- A0 =B(M)
-C
- IF (M.EQ.1) GO TO 1050
-C
- NN=M-1
- DO 1040 K=1,NN
- A2=A1
- A1=A0
- INDEX=NN+1-K
- A0=B(INDEX)+COF*A1-A2
- 1040 CONTINUE
-C
- 1050 TRISUM=TRISUM+A0*SIN(X)
-C
- RETURN
-C
- END