[HP-Prime] AMBIGUITY between Numerical Calculation (HOME) and Numerical/Symbolic Calculation (CAS mode)

[CompSystems]

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]

It's all a moot point. Neither this calculator, nor any calculator, will find its way into my math classroom.

[CompSystems]

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.