HPLX200 Solver for the PPC

[bobyeo]

The HP LX 200 had a wonder calculator with a Solver mode.
We can create formulae with it with x unknowns and then enter data for x-1 unknowns and it will calculate the remaining.

We can also plot the results or export the results to Lotus 123 which was integrated with the HP.

Is there something similar for the PPC?

[crm]

I've never used that solver, and don't understand exactly what you are trying to solve. Is it something like this:

2x+4sin(y)+z^2 = 12 given the (x,y) pairs (1,2),(4,3),(5,7) find the corresponding z for each pair? If so, this is really three independent problems that could be solved with a standard nonlinear solver in a loop.

Or are you trying to solve something different.

[bobyeo]

Some examples of the Equations I used with the Solver:

1. Body Mass Index: BMI = Weight_Kg((Ht_ft+Ht_ins/12)*0.3048)^2)

2. Boiling Point of Water: BoilPtC = ((155.3 + Mb*0.05615) - 32) * 5/9

3. Line of Sight: Dist_NM = 1.225*Sqrt(Flt_Lvl*100)

4. Nyquist's Theorem: Data_Rate = 2 * Bandwidth * LOG(Discrete_Level)/LOG(2)

OR to plot a graph, e.g. of a Butterfly

5. Butterfly: |GRAPH set xmin = -125 xmax = 125 res = 300 pressF3|
If(L(z,-g(z)+1>0,1,-1)*sqrt(x^2-(x/10)^4)

When the formulae are run, the Solver will prompt with:

1. BMI =
Weight_Kg =
Ht_ft =
Ht_ins =

2. BoilPtC =
Mb =

3. Dist_NM =
Flt_Lvl =

4. Data_Rate =
Bandwidth =
Discrete_Level =

5. x =
(This will plot a graph)

Just Key in any variables less one and it will calculate the last variable or plot a graph.

[Blackbeard]

I loved the solver on the Hp 200LX as well. The only software that I know of to replace it is at http://www.surerange.com/solver.html. It's not nearly as good but it does do most of what you're looking for. An added bonus is that it only uses about 30K of memory. I think this is your best bet. Hope this helps.

[Jorgen]

Hmmm, no trial version! I have many times ended up disappointed with products not living up to expectations - particulary PPC applications.

Jorgen

[bobyeo]

Thanks for the info.

I read the pdf "manual" but it is a lot less functional than the HP LX200's solver which does graphs, export to spreadsheets as well and I think has more maths and business functions.

Will bear this one in mind while I continue searching.

[Jorgen]

So will I - luckily my lx-200 is still going strong. I would certainly like to try it out before buying but if it does things the way I hope, I would be happy to pay their price.

Ashame HP stopped making their own systems software.

Jorgen

[MrChevy]

And I still have 2 HP 200LX's. I did install the programs from the Connect disk on my notebook so I can run all the 200LX stuff on it like the Solver and all the other stuff.

I have been looking for years for a Solver program like comes on the HP 200LX's. No luck so far. One of the finest programs I have ever used. So simple to use too.
If I need a factor and don't know it, I just enter the info I know and let the Solver program find it for me.

Yes! If anyone can find/write a Solver program like that one, I would buy it in a heartbeat.

My Palmtop history, wow, over 13 years!:

HP 95LX New 09.13.91 18:35

HP100LX New on 03/03/94 09:48:35 pm New tonight @ 18:18!

HP200LX 11/10/94 10:44:25 am new $660.00

HP Jornada 547 07/21/01 new 400$ @ Costco in Tigard
came with keyboard. bought a 64meg CF disk for 60$ also.

Over $600 from HP, so went with Dell this time for same features.
AXIM 5 15:45 05/25/03 267$ from Dell, free shipping.

[MrChevy]

Some examples of the Equations I used with the Solver:

3. Line of Sight: Dist_NM = 1.225*Sqrt(Flt_Lvl*100)

3. Dist_NM =
Flt_Lvl =



I don't quite understand what that shows bobyeo. I use the formula I came up with of:
{How far can we see? Ft Ft & Miles|SQRT(HeightOfHriznFt)+SQRT(EyeHeightFoot)=DistanceCanSee}

With my formula you can put Horizon at 0 and height of your eyes at any number of feet. ie 5.5 feet, horizon is 2.3452 miles away that we can see. Or put the height of th bridge of a ship at 75 feet above the water and you are standing on the sea shore at sea level, you can see the top of the bridge a lot further away, ie 11.0055 miles away :) Nice little formula. I made it about 10 years ago after researching.

With your formula it appears your eyes are about 150feet above sea level not counting the fact you are using NM (1 NM=1.15Miles). Where did you get the factors? I am always interested in correcting my factors.
Thanks,
Ken

[MrChevy]

Wow!

Found someone who does have a Solver type software that DOES WORK.

As much power as in the HP 200LX Solver!

http://www.infinitysw.com/products/poweronefinance.html

They have a 30 day trial version too, to see if it works. I downloaded it, installed it on my Desktop (the Desktop version) and on the PPC (Dell Axim X5) (the PPC version) and they both work excellent.

And as an added bonus, they Sync the two together, so the new Templates (formulas) I write on the Desktop get transfered to the PPC when I click the Sync button.

The price is a little steep, but I have waited so long to find software to do the Solver stuff from the HP 200LX on a PPC that I have to overlook the cost.

59.95$ each or 99.99$ for both at once (the route I am taking).

If you have ever wanted a Solver like the HP 200LX has, try this software for free for 30 days.

I am not affiliated with Infinity Softworks, but I sure like their software!

Excellent programming.

Ken

[Jorgen]

Thanks for letting us know. Do let us know how it goes.

Meanwhile the other solver has become freeware http://www.simonjudge.com/pocketsolver.html.

Jorgen