The Museum of HP Calculators

HP Forum Archive 17

 17bii+ bug update and Sum-Of-DigitsMessage #1 Posted by Bruce Bergman on 26 Feb 2007, 12:03 a.m. Don and I have been poking around the 17bii+, trying to determine if any of the bugs listed in older versions still exist, and well, trying to get used to the solver. ;-) First, there are a couple threads in Forum Archive 14... ...which talk about bugs in the early 17bii+ units. I've tried a few of these and they all work correctly, as expected, on my version. For the record, my S/N is CNA 63401403. Also, Don and I have been trading implementations for summing up the digits of a number (i.e., 123 = 1+2+3 = 6). Here is the version that ultimately worked: SOD:SUM=0xL(B:A)+sigma(I:1:LOG(A)+1:1:MOD(B:10)+0xL(B:IP(B/10))) Don also has a version which uses the statistical lists to get the sum, assuming each digit is in a list (L1) item: sod:sum=sigma(i:1:sizes(L1):1:Item(L1,i)) As we work through more, I may post some follow-ups. It's good to see that some of the ugly bugs have been fixed. Hopefully they're all good! thanks, bruce

 Re: 17bii+ bug update and Sum-Of-DigitsMessage #2 Posted by Bruce Bergman on 26 Feb 2007, 12:22 a.m.,in response to message #1 by Bruce Bergman From Forum Archive 16, this bug: Go into the FIN TVM menu and CLR DATA. Enter N=1; PV=1500; FV=-1750 Press OTHER and set P/YR=1 Press EXIT and I%YR Appears to still be an issue on my 17bii+. That is, if I have more variables than appear on one menu, it requires two presses to get it to solve for that variable. Hmmmm. In the same thread, Chris Dean says: Quote: I have used the initialisation with the summation. I did use a separate equation for the initialisation though. For example run the equation Y=AA+BB to initiate the variables. Press CALC and do not enter any variables then use L(AA:expr), L(BB:expr) and G(AA), G(BB) in your summation where ever you require them. Try this for Fibonacci Numbers Y=A+B press CALC S=L(C:A+B)+ 0*(L(A:G(B)) + L(B:G(C))) Set A=1 and B=1 and successive pressing of S should show the next Fibonacci Number. series should be 1,1,2,3,5,8,13 ............... Good luck!!! Chris I'm not sure what Chris is saying here. Am I to enter TWO equations? One for Y=A+B to init, and then one for S to execute? Does anyone know more about what the point is here? thanks, bruce

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