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 <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.