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



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


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



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


Edited: 18 Aug 2013, 8:17 p.m.

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP35s Program Four Slings Lift Calculation Jean-Marc Biram (Australia) 2 743 12-16-2013, 07:21 PM
Last Post: Jean-Marc Biram (Australia)
  HP Prime: CAS taylor Alberto Candel 5 928 12-13-2013, 09:45 PM
Last Post: Alberto Candel
  HP Prime CAS curiosity bluesun08 11 1,450 12-10-2013, 01:03 PM
Last Post: Han
  [HP-Prime CAS] "Warning, ^ (Command) Is ambiguous on non square matrices"?? CompSystems 1 660 12-07-2013, 07:15 PM
Last Post: CompSystems
  HP Prime: complex numbers in CAS. Alberto Candel 1 540 12-06-2013, 02:36 PM
Last Post: parisse
  HP Prime: Proper Use of Home View and CAS View James Williams 9 1,279 12-05-2013, 02:44 PM
Last Post: James Williams
  Integration question and "RPN" mode comment Craig Thomas 16 1,886 12-05-2013, 02:32 AM
Last Post: Nick_S
  [HP Prime] plotfunc() bug in CAS Chris Pem10 2 648 12-04-2013, 02:46 PM
Last Post: Chris Pem10
  HP Prime: Home/CAS? Alasdair McAndrew 11 1,259 11-26-2013, 02:48 PM
Last Post: Alberto Candel
  HP Prime suggestion to avoid Numeric/Symbolic confusion Chris Pem10 4 634 11-19-2013, 05:49 AM
Last Post: bluesun08

Forum Jump: