Le forum de XCAS

Hello F0( X ) := piecewise( X < -2,-X,-2 ≤ X < 0, X + 1, 0 ≤ X < 2, X - 1, X ≥ 2, X^2 ); plotfunc( F0(X), X ) [enter] ok F0( 2 ) [enter] 4 F7 := (X)->( (X<-2)? -X: ( ((-2≤X) AND (X<0))? X+1: ( ((0≤X) AND (X<2))? X-1 : ((X≥2)? X^2: X^2) ) ) ); [enter] ok plotfunc( F7(X), X ) [enter] ok F7( 2 ) [enter...

if it works in the desktop version as a pop-up window, but it is very useful to have a command that returns the output in text format.
This is done by many CAS =)

findhelp(abs, all) or findhelp(abs, '*' )

What is the command to search for common words, for example, maxima is ?? (%i1) ??abs; [shift]+[enter] returns " 0: Package abs imp 1: abs (Functions for Numbers) 2: abs boxchar (Functions and Variables for Display) 3: abs int (Functions and Variables for Fourier series) 4: abs olute_real_time (Func...

Hi Mr. Bernard We are using the online version of Xcas. One of the commands that help to see the syntax or function of a command is findhelp() on command line, but the output is a bit confusing, because tags like "Related" are missing findhelp(abs) [enter] retunrs Returns the absolute value or the n...

Hello A SEQUENCE is transformed into VECTOR with the order nop() nop( 1, 2, 3) [↵] returns [1, 2, 3] A VECTOR / LIST / SET / POLYNOMY / MATRIX is transformed into SEQUENCE with the op() cmd op( [ 1 ,2, 3 ] ) [↵] returns ( 1 ,2, 3 ) op( list[ 1 ,2, 3 ] ) [↵] returns ( 1 ,2, 3 ) op( set[ 1 ,2, 3 ] ) [...

// Increase in one unit seq1 := ( 1, 2, 3, 4 ) [enter] ( 1, 2, 3, 4 ) seq1a := seq( 1 .. 4 ) [enter] ( 1, 2, 3, 4 ) seq1b := seq( 0 .. 4 ) [enter] ( 0, 1, 2, 3, 4 ) seq1c := seq( -2 .. 4 ) [enter] ( -2, -1, 0, 1 , 2, 3, 4 ) seq1d := seq( 0.1 .. 3.8 ) [enter] ( 0.1, 1.1, 2.1, 3.1 ) seq1e := seq( -2.1...

Good. After that incorporation, I think it is convenient to move on to a new version 1.6.0

Hi

One idea, I know that there are functions for plotting images in Xcas, but it would be important to create functions that operate similarly to matplotlib.pyplot

Thank you

Edit: Although more useful is that if the first argument contains the operator .. do the following seq( from m .. n, step )

seq( 0 .. 4, 2 ) -> (0,2,4)

Hello BP seq( 0 .. 4, 1.9 ) [enter] ( 0, 1.9, 3.8 ) but seq( 0 .. 4, 2 ) [enter] [ 0 .. 4, 0 .. 4 ] Since there are two arguments, a sequence must return and not a list [ 0 .. 4, 0 .. 4 ] -> ( 0 .. 4, 0 .. 4 ) eval( seq( 0 .. 4, 2 ) ) -> [0 .. 4,0 .. 4] now the output to be useful should be seq( 0 ....

ok, but if comments are supported with # (Xcas mode), the problem of interpretation in text book mode// and / * in hp-prime is fixed.

Hi There are some outputs that I cannot understand when extracting elements, please review the following script seq1 := ( a, b, c ) /* SIMPLE [] USE OF POSITIVE INDICES [0, ...] */ seq1[ 0 ] -> a seq1[ 1 ] -> b seq1[ 2 ] -> c /* USE OF NEGATIVE INDICES [..., - 1] */ seq1[ -1 ] -> c seq1[ -2 ] -> b s...

Hi The hpprime entry line does not interpret the comments, that is, the symbols // assumes them as double division ÷÷ and /*, */ as ÷* (see discussion in https://www.hpmuseum.org/forum/thread-14355.html). Is it possible that XCAS codes interpret a comment // with the symbol # ? this way you can defi...

Hi BP, Good morning Porting the code to HP-prime, I observe that the time that Xcas throws does not approximate to deltalist(time(fract(320,240,10))) Also the copy function res2:=copy(res1) in what differs of res2:=res1? // hpprime: input mode, linear (algebraic) function fract(X_,Y_,Nmax) // Mandel...

An interesting video and information on how to validate arguments in a modern way (MatrixLab) Create rectangle coordinates before function rectCoords = createRectangleCoords(width, height, varargin) %CREATERECTANGLECOORDS Easily create coordinates for rectangle given its width %and height % Error ch...