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- From: akcs.tsblue@hpcvbbs.cv.hp.com (Thomas Stewart Blue)
- Date: Fri, 20 Nov 1992 16:40:02 GMT
- Subject: Re: Iterations on HP-48? Mail-order places?
- Message-ID: <2b0d0c00.4952.5comp.sys.handhelds.1@hpcvbbs.cv.hp.com>
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sdd.hp.com!hp-cv!hp-pcd!hpcvra!rnews!hpcvbbs!akcs.tsblue
- Newsgroups: comp.sys.handhelds
- References: <1992Nov2.210025.9774@news.duc.auburn.edu> <7360174@hpfcso.FC.HP.CO
- Lines: 39
-
- EXACTLY.
-
- Ray Depew writes:
-
- > Now, the HP Solve Equation Library card contains 2 items
- > that may be of interest to you: one is MES, the Multiple
- > Equation Solver. If you can't organize your problem into
- > one equation, then perhaps 2 or 3 (or more...) will
- > do. The MES cycles through all the equations until a
- > solution is reached. This is actually an iterative procedure.
- > I don't know if MES reorders the equations to guarantee
- > a converging solution or not, perhaps someone from
- > HP can answer.
-
- and before, states:
-
- > HP's SOLVER is versatile enough that the trial-and-error
- > is no longer necessary.
-
- I wish my experience would lead me to believe that statement is true. I
- can think of four instances where such a procedure is necessary. These
- all relate to fluid mechanics and hydrology. Two of the four instances
- have led me to search for a nice, clean, closed form solution to these
- problems. I have been unsuccessfull. That tends to be the problem with
- such scenerios: getting that nice, clean, closed form solution. In at
- least one other case I have attempted to use the MES to match the LHS &
- RHS of the primary constraining equation. The MES cycled through the
- eqautions available and produced a response to my initial input. But,
- that is where I then had to analyze the response and proceed. I talked
- with someone at hp about this. I was not sure of the structure of the MES
- or the Solver functions. It was explained to me, in not so many words,
- that the MES does not cycle through a series of given equations to
- converge on a solution (or at least that was my understanding of their
- explaination). The iterative process is resident within the Solver, not
- the MES. If I am mistaken, I would greatly appreciate an explaination of
- how I should go about getting the MES to cycle through the equations
- until it converges.
-
- tsblue@eos.ncsu.edu
-
-