|[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
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.