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Storing custom equations to directory

2007-12-03 by michicob3

How do I store an equation (written in RPN mode, either in the 
equation writer or as text to the stack) to my SD card (or any other 
directory)?  I have a lot of complex fluid, volume, and pressure 
calculations that I would like to just be able to pull up the equation 
and enter the variables to solve.  It would save me some critical time 
if I had the formulas ready to use.

Re: [50g] Storing custom equations to directory

2007-12-03 by Nancy Von Essen

Hi -- this is Ed Von Essen. I have had some experience with the 49 and 59G's. You could set up an equation library and there is one already in the 50G. It may have what you need. However, an alternate (interim) way is to create a subdirectory (not in the SD card) and store your equations as programs in the subdirectory. This means that you can enter your data on the stack and call the program -- results will be on the stack. To store an object in memory, in RPN, one enters the ' key and then types in the letters (ALPHA) for the name, then presses the STO key.

There are a few tutorials on the WEB. One is: "an introduction to programming HP graphing calculators". Choose the Thiel college site.

If this doesn't get you going, ask me. Oh, make sure that you store a copy of the subdirectory on the SD card. My betteries died in my 49G and the memory contents in RAM disappeared.

michicob3 wrote:

Show quoted textHide quoted text

How do I store an equation (written in RPN mode, either in the
equation writer or as text to the stack) to my SD card (or any other
directory)? I have a lot of complex fluid, volume, and pressure
calculations that I would like to just be able to pull up the equation
and enter the variables to solve. It would save me some critical time
if I had the formulas ready to use.

Re: [50g] Storing custom equations to directory

2007-12-03 by Don Hart

You might find the following 2 programs useful...
http://www.hpcalc.org/details.php?id=6050
http://www.hpcalc.org/details.php?id=4394


--- michicob3 <michicob3@...> wrote:

> How do I store an equation (written in RPN mode,
> either in the 
> equation writer or as text to the stack) to my SD
> card (or any other 
> directory)?  I have a lot of complex fluid, volume,
> and pressure 
> calculations that I would like to just be able to
> pull up the equation 
> and enter the variables to solve.  It would save me
> some critical time 
> if I had the formulas ready to use.
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
> 
> 



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Re: Storing custom equations to directory

2007-12-04 by Tim Wessman

> You might find the following 2 programs useful...
> http://www.hpcalc.org/details.php?id=6050

Good, but not so easy to make your own libraries without a lot of
programming knowledge (unless something changed since the last time I
looked at it).

> http://www.hpcalc.org/details.php?id=4394

The entire reason I wrote my equation manager.  It works, but is way
too big (32K?!?!), and way too slow (choose menus?!?!?).  Doesn't have
the ability for units in your calculations either. Until the latest is
up at hpcalc.org, you can get it here:

http://pssllc.com/pub/pequm.zip

This lets you assign notes and units to variables in your equations,
as well as solve individual or multiple equations.

TW