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ewset.f
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1996-09-28
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33 lines
SUBROUTINE EWSET (N, ITOL, RTOL, ATOL, YCUR, EWT)
CLLL. OPTIMIZE
C-----------------------------------------------------------------------
C THIS SUBROUTINE SETS THE ERROR WEIGHT VECTOR EWT ACCORDING TO
C EWT(I) = RTOL(I)*ABS(YCUR(I)) + ATOL(I), I = 1,...,N,
C WITH THE SUBSCRIPT ON RTOL AND/OR ATOL POSSIBLY REPLACED BY 1 ABOVE,
C DEPENDING ON THE VALUE OF ITOL.
C-----------------------------------------------------------------------
INTEGER N, ITOL
INTEGER I
DOUBLE PRECISION RTOL, ATOL, YCUR, EWT
DIMENSION RTOL(1), ATOL(1), YCUR(N), EWT(N)
C
GO TO (10, 20, 30, 40), ITOL
10 CONTINUE
DO 15 I = 1,N
15 EWT(I) = RTOL(1)*DABS(YCUR(I)) + ATOL(1)
RETURN
20 CONTINUE
DO 25 I = 1,N
25 EWT(I) = RTOL(1)*DABS(YCUR(I)) + ATOL(I)
RETURN
30 CONTINUE
DO 35 I = 1,N
35 EWT(I) = RTOL(I)*DABS(YCUR(I)) + ATOL(1)
RETURN
40 CONTINUE
DO 45 I = 1,N
45 EWT(I) = RTOL(I)*DABS(YCUR(I)) + ATOL(I)
RETURN
C----------------------- END OF SUBROUTINE EWSET -----------------------
END