HP Forum Archive 17

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Permutation Typo? Message #1 Posted by Vincze on 28 Aug 2007, 9:40 a.m. I do search and not see this before, so I am looking for clarification. I have to do a permutation this morning and when I look on page 4-15 of 35s manual, it is my understanding that to find a permutation, I must type N (number of items) first, then press nPr and then r (number of items at a time). If I follow this instruction, I get INVALID DATA message. Am I correct in thinking that I must enter n into calculator and hit ENTER, then enter r and press nPr? This seem to give correct result. Did I misread manual? Edited: 28 Aug 2007, 10:16 a.m.

Re: Permutation Typo? Message #2 Posted by Gene Wright on 28 Aug 2007, 10:21 a.m., in response to message #1 by Vincze Check the "Note" in the box on page 1-10 of the manual. The go back to page 4-15. While I'm not a big fan of this approach, it is what it is.

Re: Permutation Typo? Message #3 Posted by Vincze on 28 Aug 2007, 10:44 a.m., in response to message #2 by Gene Wright That would seem to indicate that when the check is seen, they are showing it in RPN. That still does not make sense as my calculator in RPN.

Re: Permutation Typo? Message #4 Posted by Chuck on 28 Aug 2007, 10:57 a.m., in response to message #3 by Vincze Quote: That would seem to indicate that when the check is seen, they are showing it in RPN. That still does not make sense as my calculator in RPN. A minor typo possibly; they gave the ALG instructions. But as always with RPN, two arguments THEN the operation, ie., 15 nPr 5 should be entered 15 ENTER 5 nPr. I've seen the blue check in various places it shouldn't be.

Re: Permutation Typo? Message #5 Posted by Vincze on 28 Aug 2007, 11:02 a.m., in response to message #4 by Chuck Thank you my friend for the clarification. Mt friend Gene, did you write this page? ;)

Re: Permutation Typo? Message #6 Posted by Gene Wright on 28 Aug 2007, 11:41 a.m., in response to message #5 by Vincze No, I did not. I'm not a big fan of the check mark approach. I would rather see instructions given in both logic systems all the time.

Re: Permutation Typo? Message #7 Posted by Thomas Radtke on 28 Aug 2007, 12:30 p.m., in response to message #4 by Chuck It would be wrong even if ALG was meant. It just does not work this way.

Re: Permutation Typo? Message #8 Posted by Don Shepherd on 28 Aug 2007, 1:43 p.m., in response to message #1 by Vincze Good find, Vincze. Seems an update to the manual is in order.

Re: Permutation Typo? Message #9 Posted by Vincze on 28 Aug 2007, 1:48 p.m., in response to message #8 by Don Shepherd I going to assume Combinations on same page wrong too. It has same input format. I wonder why HP decide to use check mark approach on this? I wonder if other check mark examples flawed too. I also wonder if just certain technical writer ones who do check mark examples, and other do other way? It sure be nice to have PDF of manual.

Re: Permutation Typo? Message #10 Posted by Gene Wright on 28 Aug 2007, 1:59 p.m., in response to message #9 by Vincze Oh my! Too close to things - my only defense. Yes, this language looks like a portion where the original description for the HP33s was kept by mistake. The HP35s uses a more Equation Operating System style flavor of algebraic compared to the HP33s. As such, algebraic functions are prefix functions now (except for factorial, which still doesn't make sense to me). But, the manual appears to be based upon the 33s manual and this was missed. FYI, I don't know why the PDF of the manual is not up yet.

Re: Permutation Typo? Message #11 Posted by Vincze on 28 Aug 2007, 2:06 p.m., in response to message #10 by Gene Wright I take it you get in trouble if you shared PDF version?

Re: Permutation Typo? Message #12 Posted by Gene Wright on 28 Aug 2007, 3:16 p.m., in response to message #11 by Vincze What PDF version? Don't know what you are talking about.

Re: Permutation Typo? Message #13 Posted by Vincze on 28 Aug 2007, 3:30 p.m., in response to message #12 by Gene Wright PDF version of 35s manual. From your message it seem to indicate that there is one.

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