04-18-2019, 12:06 PM

04-18-2019, 01:26 PM

The algebraic word is not very explicit, the input of expressions in "algebraic" mode can be either linearly / 1D (beginning of the computational syntax) or Two-dimensional/2D emulating the true notation of the mathematics books also called prettyprint.

The linear notation and prettyprint many call it infix notation, which is not always true, for example 5! the factorial operator is postfix, the operators ABS, CEIL and FLOOR are in notation exofix

|-6.5|, ⌈-5.3⌉, ⌊-2.9⌋

In summary I would say standard notation (1D / 2D) and RPN

1: Standard

Linear input (1D): (a + b) ^ 2

Two-dimensional input (math textbook): (a + b) ²

2: RPN: a b + 2 ^

All the above talking about the entry of expressions in the history view, even the hpprime in the programming view is encoded linearly "algebraic", the only calculator that is encoded in two-dimensional notation is the TInspire

Notice in the following image that the variables SOL1 and SOL2 have mathematical expressions in 2D

Currently the GIAC / Xcas engine supports python syntax in standard mode, please add this entry mode in the survey

legendre_(2),legendre_(2,y),legendre_(2,"list"),legendre_(2,10),legendre_(2,cos(t)) [enter]

1/8*(12*x^2-4), 1/8*(12*y^2-4), poly1[3/2,0,-1/2],2 99/2, 1/8*(12*cos(t)^2-4) // the above output is written in linear notation

Finally I dream of a 100% entry mode in RPN, the teacher Bernard Parisse informs that it is difficult but I think it is not impossible that it can be encoded in some day in XCAS in RPN mode =)

https://xcas.univ-grenoble-alpes.fr/foru...=19&t=2313

The linear notation and prettyprint many call it infix notation, which is not always true, for example 5! the factorial operator is postfix, the operators ABS, CEIL and FLOOR are in notation exofix

|-6.5|, ⌈-5.3⌉, ⌊-2.9⌋

In summary I would say standard notation (1D / 2D) and RPN

1: Standard

Linear input (1D): (a + b) ^ 2

Two-dimensional input (math textbook): (a + b) ²

2: RPN: a b + 2 ^

All the above talking about the entry of expressions in the history view, even the hpprime in the programming view is encoded linearly "algebraic", the only calculator that is encoded in two-dimensional notation is the TInspire

Notice in the following image that the variables SOL1 and SOL2 have mathematical expressions in 2D

Currently the GIAC / Xcas engine supports python syntax in standard mode, please add this entry mode in the survey

PHP Code:

`#cas`

def legendre_( n, evalX="" ):

local px, x; purge(x)

px := 1/(2^n*n!)*diff((x^2-1)^n,x,n)

if getType(evalX)=="NUM" or getType(evalX)=="EXPR" or getType(evalX)=="VAR":

px:=subst(px,x=evalX)

elif getType(evalX)=="STR" and evalX=="list":

px:=e2r(px)

return px;

#end

legendre_(2),legendre_(2,y),legendre_(2,"list"),legendre_(2,10),legendre_(2,cos(t)) [enter]

1/8*(12*x^2-4), 1/8*(12*y^2-4), poly1[3/2,0,-1/2],2 99/2, 1/8*(12*cos(t)^2-4) // the above output is written in linear notation

Finally I dream of a 100% entry mode in RPN, the teacher Bernard Parisse informs that it is difficult but I think it is not impossible that it can be encoded in some day in XCAS in RPN mode =)

https://xcas.univ-grenoble-alpes.fr/foru...=19&t=2313

04-18-2019, 04:58 PM

You might get more replies if you change the question to "Which entry mode do you use the most?" I use all three, depending on what I'm doing, so I can't answer the poll as currently stated.

04-18-2019, 05:16 PM

(04-18-2019 01:26 PM)compsystems Wrote: [ -> ]The algebraic word is not very explicit, ...In the HP Pime parlance, "Algebraic" is very explicit. Just read the explanation of the different entry types in the user manual (page 20):

● Textbook—An expression is entered in much the same way as if you were

writing it on paper (with some arguments above or below others). In other words,

your entry could be two-dimensional.

● Algebraic—An expression is entered on a single line. Your entry is always one-dimensional.

● RPN—Reverse Polish Notation. The arguments of the expression are entered

first followed by the operator. The entry of an operator automatically evaluates

what has already been entered.

04-18-2019, 05:36 PM

(04-18-2019 04:58 PM)Joe Horn Wrote: [ -> ]You might get more replies if you change the question to "Which entry mode do you use the most?" I use all three, depending on what I'm doing, so I can't answer the poll as currently stated.

I updated the title, not sure I can update the poll...