Maple Questions and Posts

These are Posts and Questions associated with the product, Maple

I would like to plot graph of 2d function f(x, y) = (-ax/(1+y^2), x+by) where x from -5 to 5 and y from -5 to 5 and parameter bar of a and b. Thank you 

As I am new to using the statistics package, I have some doubts about how to perform certain operations in Maple.

For example, let sigma be a variable containing any real number, finding the average is easy, just use the command A0:=Median(sigma) and if you want A (see image below) just take A1:=A0^2. However, the terms that make up <sigma^2> cause a certain difficulty, how to do this? In other words, calculate the B of the image?

sigma := [2, 4, 0, 6]

AMedia := (2 + 4 + 0 + 6)/4;
AMedia1 := AMedia^2;


A0 := Median(sigma)

A1 := A0^2

BMedia := (2^2 + 4^2 + 0^2 + 6^2)/4

sigma0 := sigma^2

sigma1 := Mean(sigma0)


hi every one.

in the attached maple file at line x=o in the plotted figure we have some inconsistency in starting the branches from x=0 and the branches do not start from the same value on this axis.

I can not find the problem because there are not any differences between phi 1 and phi 2! 

evalf(f1 - f2)= -5* 10 ^-49

Good day,
I am trying to solve the following problem.

For the following system:




With the following initial condition


What are the smallest e1 and e2 that would solve the system?
I would try a graphical approach to find them, but I don’t seem to set the correct procedure.
Thanks in advance!

How to clear this error and frame the series

I thought I was improving my code by adding ::type to all the _self in my OOP code. As this is one main advantage in programming in Maple, which is being able to attach types to all name and variables. Make code more robust.

But it turned out Maple is not very happy now and gives that drearded error

    Error, static procedure ... refers to non-static local or export ... in surrounding scope

Only place I found that adding ::type_name is to _self is allowed, is on the constructor signature.

But in no other method of the object module. local or export method, it does not matter. 

My question is, why is that?

So I went and removed all those _self::type_name and made it just _self to make Maple happy.

I also noticed this happes regardless of having kernelopts('assertlevel'=2): there or not.  Attached  is the worksheet.

Just tryting to understand the logic, that is all. 

This is using Maple 2023.2.1


`Standard Worksheet Interface, Maple 2023.2, Windows 10, November 24 2023 Build ID 1762575`






  export module person()
   option object;
   local m_name::string;
   local m_age::integer;
   export ModuleCopy::static:=proc(_self::A:-person,proto::A:-person,name::string,age::integer,$)
          _self:-m_age := age;
   end proc;
   export name::static:=proc(_self,$) m_name; end proc;
   export age::static:=proc(_self,$) m_age; end proc;
 end module;

export  module young_person()
   option object;
   local m_person::A:-person;
   export ModuleCopy::static:=proc(_self::A:-young_person,proto::A:-young_person,p::A:-person,$)
          _self:-m_person := p;     
   end proc;
   local process_it::static:=proc(_self,$)
   end proc;

   #to fix the problem, check _self::A... to just _self,  then no error!
   export process_it_from_outside::static:=proc(_self::A:-young_person,$)
   end proc;

end module;

end module;



module person () local m_name::string, m_age::integer; option object; end module



Error, static procedure `young_person:-process_it_from_outside` refers to non-static local or export `young_person:-m_person::A:-person` in surrounding scope




I am looking for an optimal layout of a function's variation table. I know that LaTeX generates this type of table with good formatting quality. Is there a way to integrate it into Maple?


I'd like to use Maple to make measurements on a map (Dealey Plaza). I can load an image in Sketcher and draw lines on it, but can't figure out how to access the lengths of those lines.


estart; with(Physics); with(LinearAlgebra); with(VectorCalculus); with(Optimization); with(Statistics); with(ArrayTools); with(plottools); with(plots); with(Threads); with(MmaTranslator[Mma]), with(StringTools); with(CodeGeneration); VectorCalculus:-`*`(Setup(mathematicalnotation = true), Setup(coordinatesystems = cartesian))



[annulus, arc, arrow, circle, cone, cuboid, curve, cutin, cutout, cylinder, disk, dodecahedron, ellipse, ellipticArc, exportplot, extrude, getdata, hemisphere, hexahedron, homothety, hyperbola, icosahedron, importplot, line, octahedron, parallelepiped, pieslice, point, polygon, prism, project, rectangle, reflect, rotate, scale, sector, semitorus, sphere, stellate, tetrahedron, torus, transform, translate]


`Default differentiation variables for d_, D_ and dAlembertian are:`*{X = (x, y, z, t)}


`Systems of spacetime Coordinates are:`*{X = (x, y, z, t)}









Dear all

I have a system of differential equation with initial condition. 
I try to get the exact solution bur unfortunattely dsolve does not return the exact solution of my system

Thank you 

I have a function (see attached file).  How can I find by Maple 
those values of beta and f for which W will have 
three consecutive local extrema between the
phi=0 and phi_0 where W=dW/dphi=0 at phi=0 and W=0 at phi_0 and W<0 for 0<abs(phi)<phi_0?

We have just released an update to Maple 2023 to address a couple of issues.

  • We’ve had a few reports of people encountering “Kernel connection has been lost” errors, and this update should fix that problem.
  • We fixed a problem involving entering math (specifically, the right curly bracket, } ) using an international keyboard.

If you are experiencing kernel connection problems or use Maple with an international keyboard, you should install this update.

This update is available through Tools>Check for Updates in Maple, and is also available from the Maple 2023.2.1 download page. MapleSim users can get this update from the MapleSim Check for Updates or from the MapleSim 2023.2.1 download page, where you will also find an update to the MapleSim Ropes and Pulleys Library.

Any smarter assumptions or substitutions I could try out on the left handside of the below


If this does not work I would be greatefull for fast numerical evaluation methods. Plotting for example takes to long.

Attached you will find some background on what I want to achieve.

This is probably a real dummy question. Why can I not plot the units in this worksheet? Thanks in advance for your help

I have a pretty ugly nested integral (in my opinion) that I am trying to compute. I thought that I simplified the problem to an easier siutation however during my attempted calculations I am recieving: "Error, (in evalf/int) cannot handle unevaluated name `L` in evalhf

I am unsure where this is coming from, I would assume something in procedure or my attempted use of unapply is incorrect. Any comments are welcome, including those that state I am doing this entirely incorrectly. 


I need to highlight all terms that contain eta, my variable, for example (A0)+(A1)*1/eta+(A2)*1/eta^2+...(An)**1/eta^n and so on in my expression call from P. However, when I select eta through the collect command, maple is unable to carry out the command.

P := expand((cosh(k*eta) + alpha*m*sinh(k*eta)/eta)^3);
P := convert(P, exp);
P := expand(P);
P := collect(P, eta);
P := combine(P);

Once these have are in evidence I need to select the coefficients A0, A1, A2, etc. How to proceed if eta are in the denominator and maple does not work with this possibility? This it'was my tentative

B0 := subs(eta = 0, P);

B1 := coeff(P, eta)

B2 := coeff(P, eta^2)

I actually tested the possibility of  1/eta instead of  eta and it didn't work

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