[HP-Prime] AMBIGUITY between Numerical Calculation (HOME) and Numerical/Symbolic Calculation (CAS mode) « Next Oldest | Next Newest »

 ▼ CompSystems Unregistered Posts: 213 Threads: 60 Joined: Mar 2013 08-16-2013, 09:06 PM 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 ▼ Don Shepherd Unregistered Posts: 1,392 Threads: 142 Joined: Jun 2007 08-16-2013, 10:17 PM It's all a moot point. Neither this calculator, nor any calculator, will find its way into my math classroom. ▼ CompSystems Unregistered Posts: 213 Threads: 60 Joined: Mar 2013 08-18-2013, 07:06 PM 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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