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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
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