HP33S question: Poll - Try this in algebraic mode « Next Oldest | Next Newest »

 ▼ Gene Posting Freak Posts: 1,107 Threads: 159 Joined: Jan 1970 05-12-2004, 10:53 AM In algebraic mode (distasteful, I know) :-) Press: 24 divide 12 X<>Y ENTER and what do you get? 1) Does your HP33S show 0.5? or 2) Do you get a divide by zero error? Make sure you're in algebraic mode. Gene ▼ V-PN Posting Freak Posts: 785 Threads: 13 Joined: Jan 2005 05-12-2004, 11:47 AM ```"DIVIDE BY 0" Test using two different calculations... [VPN] ``` Mike Posting Freak Posts: 899 Threads: 193 Joined: Jan 2005 05-12-2004, 11:51 AM From the manual Appendix C-7 ; In normal operation in ALG mode, the stack in ALG mode differs from the one in RPN mode. (Because when you press =, the result is not placed into X1, X2 etc.) Only after evaluating equations, programs, or integrating equations, the values of the four registers will be the same as in RPN mode. ▼ Mike Posting Freak Posts: 899 Threads: 193 Joined: Jan 2005 05-12-2004, 12:07 PM I can not figure how to change the stack in ALG mode, x1, x2, x3, and x4 stay the same even after evalauting an equation. x4 in my stack is 0.00, so when I perform the fuction x<>y 0 is place in the operation an I get a divided by zero error. Matt Kernal Senior Member Posts: 267 Threads: 27 Joined: Jul 2005 05-12-2004, 12:10 PM I get "DIVIDE BY 0" error. Are you sure the 33S uses the xyzt stack in algebraic mode? I don't think it does. Are you assuming when the top line displays "24 /", that the 24 is the value of the y register? If the 33S doesn't use the stack, then pressing x<>y, with the resulting "DIVIDE BY 0" error, is correct, because the y register (or z and t) do not "exist" (ie. it's null or 0) in algebraic mode. Of course, I could be wrong, I don't have my manual handy. In algebraic mode, try "populating" the four registers as follows: 1 2 3. Now try Rolling the stack with the (roll down) or (roll up) keys. The top line of the display shows: x1 x2 x3 x4, but rolling the stack shows 0 in each location, which to me, indicates the stack isn't being used. Somebody correct me if I'm not understanding this operation; as I said, I don't have my manual handy. Matt 12345 to delete ▼ V-PN Posting Freak Posts: 785 Threads: 13 Joined: Jan 2005 05-12-2004, 01:39 PM I think the ALGebraic "stack" is 14 slots in size [VPN] Wayne Stephens Member Posts: 163 Threads: 13 Joined: Jan 1970 05-12-2004, 02:16 PM I've never operated it in algabraic mode before.... Take care. Wayne ▼ Wayne Stephens Member Posts: 163 Threads: 13 Joined: Jan 1970 05-12-2004, 02:48 PM On my machine, in ALG mode, after keying in "24" then "divided by", the top line shows 24 followed by a "divided by" sign, and the bottom row displays 24.0000 (the calc is in Fix 4 display mode). I then key in 12, which shows up on the second line. Keying in "x<>y" (swap) causes the numbers to reverse: 12 followed by a "divided by" sign on the top row and 24.0000 on the bottom row Hitting the "Enter" key (which I assume is the "=" for algabraic mode?) results in '12 "divided by" 24 =' being displayed on the top row and 0.5000 on the bottom row. No divide by zero error. Interestingly, keying "x<>y" from there causes the top row to clear, and the bottom row to display 24.0000. Keying it again displays 0.5000 on the bottom row, again displays 24.0000, etc. etc. That is how my machine, which was one of the very first ones sold by WalMart.com, behaves. I cannot explain why some are getting the divide by zero error. Take care. Wayne. ▼ r. d. baertschiger. Junior Member Posts: 5 Threads: 0 Joined: Jan 1970 05-12-2004, 03:07 PM I also get the same results as Mr. Stephens. rdb. Wayne Stephens Member Posts: 163 Threads: 13 Joined: Jan 1970 05-12-2004, 07:49 PM When I got home from work this evening I tried Gene's recommended calculation on my "new" 33S (purchased from the "second" batch of Walmart.com calcs, about three weeks ago). With this calculator I get the "Divide by 0" Error. The first x<>Y "swap" entry results in 24 followed by "divided by" in the top row, and 0 in the bottom row, which certainly will result in a "Divide by Zero" error when one pushes the "Enter/=" key. The question is, why is my "newer" 33S treating the "stack" differently from my "original" 33S. Obviously there is some difference between the "first run" and "second run" of these calculators; or at any rate there are two different "versions" out there. By the way, I would never have found this little glitch in a million years on my own, because I stubbornly and irrationally refuse to recognize the legitimacy of "algebraic entry" calculators. I am willing to admit they EXIST, I'm just not willing to USE one of the wretched things. Before today, I literally had never put either of my 33S calcs into ALG mode. I have not yet found any differences between the two when operating in RPN mode, but that doesn't mean they are not there. Thanks A LOT, Gene, now I'm going to be up all night doing "side by side" calculations on these two machines. Take care. Wayne. ▼ Wayne Stephens Member Posts: 163 Threads: 13 Joined: Jan 1970 05-13-2004, 07:04 AM And boy am I tired... Take care. Wayne Julián Miranda (Spain) Member Posts: 57 Threads: 3 Joined: Feb 2007 05-12-2004, 03:57 PM I press "CLEAR" then I try and get "DIVIDE BY 0", trying again, without clearing, I get 2. Mike Posting Freak Posts: 899 Threads: 193 Joined: Jan 2005 05-12-2004, 05:04 PM I called HP calculator customer support, the technician's calculator swap X<>Y correctly. He got 0.5 when he did the calculation. Said he would send me a new one to try. His Serial # was CNA40..., mine is CNA413.... ▼ John Senior Member Posts: 348 Threads: 74 Joined: Jun 2013 05-12-2004, 05:06 PM I'm not sure it is a mistake one way or the other. It is certainly not something to rush off to replace a 33s for. Mike Sebastian Member Posts: 81 Threads: 4 Joined: Jul 2005 05-12-2004, 05:13 PM I get 0.5. My 33S is one of the early Walmart units (CN404*****). ▼ Chris Catotti Member Posts: 167 Threads: 31 Joined: Jun 2006 05-12-2004, 09:56 PM 24 divide 12 X<>Y ENTER I get 0.5 From WalMart.com in the first lot, Serial Number CN40401230 ▼ Robin Junior Member Posts: 23 Threads: 4 Joined: Jan 1970 05-13-2004, 11:44 AM Serial 41109.. ..but I don't mind, I'm never using ALG. Robin 12345 Trent Moseley Senior Member Posts: 406 Threads: 47 Joined: Jul 2005 05-14-2004, 06:27 PM First I go into ALG mode from RPN. Key in: 24 divide 12 X<>Y ENTER. I get 2.0. So then I hit the left arrow button. Key in the same sequence and I get "DIVIDE BY 0"!!! Bought direct from HP May 5th. Ser. No. CNA4110.... tm

 Possibly Related Threads... Thread Author Replies Views Last Post Integration question and "RPN" mode comment Craig Thomas 16 4,895 12-05-2013, 02:32 AM Last Post: Nick_S HP Prime: Recommendation for future RPN Program Mode BruceTTT 3 1,677 11-13-2013, 10:03 PM Last Post: BruceTTT Program to change entry mode on Prime Michael de Estrada 3 1,469 10-28-2013, 10:13 AM Last Post: Han Prime: Exam mode (possible duplicate after funny response first time) Paul Townsend (UK) 1 1,223 10-24-2013, 03:09 PM Last Post: Tim Wessman Does RPN entry mode cause the Prime keyboard to lock up ? Michael de Estrada 14 3,927 10-22-2013, 06:27 PM Last Post: John Colvin HP Prime: Edit integer in RPN mode plivesey 15 4,063 10-18-2013, 04:34 PM Last Post: kris223 Temporary User Mode Key Programs not working in RPN BruceTTT 7 2,200 10-14-2013, 01:46 PM Last Post: BruceTTT HP Prime: MAKELIST in RPN mode? toml_12953 2 1,385 10-13-2013, 07:40 PM Last Post: BruceH Low battery slow mode Marcel Samek 4 1,307 09-18-2013, 02:02 PM Last Post: Harald Back to School/Work/Other Calculator Poll Eddie W. Shore 63 13,272 09-12-2013, 06:03 AM Last Post: bhtooefr

Forum Jump: