The Museum of HP Calculators

HP Forum Archive 21

 [HP-Prime] AMBIGUITY between Numerical Calculation (HOME) and Numerical/Symbolic Calculation (CAS mode)Message #1 Posted by CompSystems on 16 Aug 2013, 9:06 p.m. Hello HOME mode == ( Numerical Calculation ) => detects errors of the inputs // OK CAS mode == ( Numerical/Symbolic Calculation ) => NO detects errors of the inputs? this causes confusion to students (anti-pedagogical) Which one of you wants a CAS to operate in this way in teaching and learning mathematics? Edited: 18 Aug 2013, 6:13 p.m. after one or more responses were posted

 Re: [HP-Prime] HOME (numerical) mode versus CAS mode (simbolic) Message #2 Posted by Don Shepherd on 16 Aug 2013, 10:17 p.m.,in response to message #1 by CompSystems It's all a moot point. Neither this calculator, nor any calculator, will find its way into my math classroom.

 [HP-Prime] AMBIGUITY between Numerical Calculation (HOME) and Numerical/Symbolic Calculation (CAS mode)Message #3 Posted by CompSystems on 18 Aug 2013, 7:06 p.m.,in response to message #2 by Don Shepherd Hello sorry for the bad English Question for hpMuseum forum users, teachers, programmers and other Is logical that an entry in numerical mode (HOME), have different answer in mode numerical/symbolic (CAS)? Thanks for your reply .... Solution, the CAS validate all inputs with the rules of linear algebra and ready, no BUGs =) to whether simple as it does in the mode HOME considerations, to avoid ambiguity HOME/CAS ... 0: not consider [] * [] As a dot product, best use dotProd(a, b) command or use the centered dot symbol // idea [] . [] == dotProd(a, b) 1: [i, 1] consider it as 2 elementos vector and not as matrix (1 row , 2 columns) //HP48/50 =) [[ i, 1 ]] // matrix ///////////// Request #0: display [ a; b; c ] on history like vertical or column vector, purpose pretty print or MathBook Request #1: use |vector or matrix | as absolute value element to element, and not as vector norm idea double symbol || as norm || vector or matrix || like MathBook Request #2 new command (.= or .== ) for to compare element by element ( vector or matrix .= vector or matrix ) Request #3 use true/false (keyword current) logic value instead of 1/0, is more intuitive true/false for a beginner user, or by an flag enable output numeric or keyword Request #4 use e. as an approximate value Thanks Edited: 18 Aug 2013, 8:17 p.m.

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