fsub.f File Reference

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Functions/Subroutines
subroutine	fsub (time, t, a, b, dd, h1, h2, h3, h4, func, funcp)

Function/Subroutine Documentation

fsub()

subroutine fsub	(	real*8	time,
		real*8	t,
		real*8	a,
		real*8	b,
		real*8	dd,
		real*8	h1,
		real*8	h2,
		real*8	h3,
		real*8	h4,
		real*8	func,
		real*8	funcp
	)

!
      implicit none
!
      real*8 time,t,a,b,dd,h1,h2,h3,h4,fexp,fsin,fcos,func,funcp,
     &  h8,h9,h10,h11,h12,h13
!
      fexp=dexp(-h1*t)
      fsin=dsin(dd*t)
      fcos=dcos(dd*t)
      h8=(a+b*time)*fexp/h2
      h9=-b*fexp/h2
      h10=-h8*h1
      h11=h8*dd
      h12=h9*(-h1*t-h3/h2)
      h13=h9*(dd*t+h4)
!
!     function
!
c      fsub=(a+b*time)*fexp*(-h1*fsin-dd*fcos)/h2-b*fexp/h2*((-h1*t-h3/h2)*
c     &     fsin-(dd*t+h4)*fcos)
      func=h10*fsin-h11*fcos+h12*fsin-h13*fcos
!
!     derivative of the function
!
      funcp=-h1*func+dd*(h10*fcos+h11*fsin+h12*fcos+h13*fsin)
!
      return