hp50g stack « Next Oldest | Next Newest »

 ▼ Sok-khieng Chum Hun Unregistered Posts: 19 Threads: 10 Joined: Mar 2010 09-17-2010, 07:10 AM Hello everyone, Do any of you know an application that displays the calculation while in rpn mode on the 50g like it does when in algebraic mode? Thank you :) ▼ Crawl Unregistered Posts: 306 Threads: 3 Joined: Sep 2009 09-17-2010, 02:24 PM Um, it depends on exactly what you want to do? In my opinion, this is not the sort of thing that needs an "application". It is too simple a problem. Often the easiest thing to do if you want a record of your calculation AND a numerical result is to just hit ENTER, then ->NUM. Then the unevaluated expression is in level 2 and the number is in level 1. Say you're working completely with numbers, though. Then everything will be evaluated as you enter it, right? Here's a trick around it: Enter the first step as an algebraic object. Let's say you want to enter sin(1+2*(3-4)^(1/2)). Hit ' 3-4 Enter. You should have '3.-4.' on the stack. Alternatively, enter 3-4 with the equation writer. Then you can use RPN normally. The rest of the steps: 2 1/x ^ 2* 1 + sin you will then have sin((3.-4.)^(0.5)*2.+1.) on the stack. Hit Enter and then EVAL. The equation will be in level 2, the result in level 1. A couple of caveats: You must be in approx. mode. (Also, for this particular example, complex mode) Also, sometimes square roots, for whatever reason, trigger an EVAL. That's why we raised to the 0.5 power instead. ▼ Sok-khieng Chum Hun Unregistered Posts: 19 Threads: 10 Joined: Mar 2010 09-17-2010, 05:54 PM Wow! That trick is cool! Now I can even work on my 48gx and my university team mates won't doubt about my calculations! Thank you alot :) ▼ Martin Pinckney Unregistered Posts: 1,248 Threads: 33 Joined: Aug 2007 09-17-2010, 08:33 PM Indeed, that is cool, Crawl. Even works on my 48sx dinosaur! Once the whole equation is on the stack, just press [VIEW] to see it in Equation Writer (similar to Textbook), then hit [ATTN] to return to where you were.

 Possibly Related Threads… Thread Author Replies Views Last Post HP 50g - select characters on the stack, copy/paste Sean Freeman 7 2,654 11-20-2013, 07:11 AM Last Post: Sean Freeman Prime: Placing more than 1 item on the RPN stack in a single program? John Colvin 4 2,236 11-19-2013, 08:59 AM Last Post: Miguel Toro emu48 - copy stack doesn't work (as expected) Thomas Radtke 2 1,950 11-11-2013, 02:19 PM Last Post: Thomas Radtke HP Prime Stack operations from within a program John Colvin 1 1,359 11-08-2013, 09:45 PM Last Post: Helge Gabert Prime: Anyway to refresh stack? kris223 5 2,102 10-16-2013, 05:09 PM Last Post: kris223 hp prime - sending program results to the stack giancarlo 6 2,073 10-15-2013, 02:00 AM Last Post: Giancarlo HP Prime - RPN stack access from programs? Mike Mander (Canada) 10 3,355 09-30-2013, 11:20 AM Last Post: steindid hp50g screen weird line Sok-khieng Chum Hun 2 1,597 09-10-2013, 08:11 AM Last Post: Sok-khieng Chum Hun Documentation about Hp50g / 49g+ / 48gII and wikis Pier Aiello 9 2,905 09-10-2013, 04:22 AM Last Post: Software49g WP-34S: Stack after divide by 0 Marcel Samek 4 1,389 08-24-2013, 11:57 PM Last Post: Paul Dale

Forum Jump: