MaplePrimes - Maple Posts and Questions

Why calling object method in debugger fail?

nm — Wed, 13 May 2026 17:47:51 Z

Is there a workaround to being able to call object method inside the debugger? I use Objects everywhere and hard to debug things when not able to try calls inside the debugger.

Here is an example.

This worksheet below has the code to reproduce this. Ofcourse the code works when I run it in the debugger using "continue" button, or using the "next" or "step". But I need sometimes to check something before doing this.

>	interface(version);

restart;

>	kernelopts('assertlevel'=2):

>	module person_type() option object; local _name::string:=""; export ModuleCopy::static := proc( _self::person_type, proto::person_type, name::string) _name:=name; NULL; end proc; export get_name::static:=proc(_self) _self:-_name; end proc; end module;

>	foo:=proc(o::person_type)::string; local name; DEBUG(); name:=o:-get_name(); name; end proc;

>	o:=Object(person_type,"me");

>	o:-get_name();

>	#run this. Debugger will now open foo(o);

Download why_calling_object_fail_in_debugger.mw

plotting an 1-D array

wingho — Mon, 11 May 2026 20:14:59 Z

Please see the attached worksheet:

Question 1: How to plot a partial portion of an array s2 using "dataplot," say the first 50 elements.

Question 2: I have also tried to use "plot" to plot the first 50 elements s2 and keep on getting errors or strange looking plot with horizontal lines. I have tried plot(s2,1..50), plot(s2,x=1..50), plot(s2,m=1..50), plot(s2[m],m=1..50), plot(s2[1..50],1..50], plot(1..50,s2[1..50]).

plot_exercise_a.mw

How apply special transformation ?

salim-barzani — Mon, 11 May 2026 08:09:36 Z

How i can apply this transfromation which is special and i can't undrestand how from that solution he did thus changes and get the solution of ode , i reached untill eq(3.5) but after that i can't figure out what he did and how we get eq(3.7)-(3.9) (3.12),(3.13) and how we can tranform solution for the eq(3.5)

fp.mw

Cube (Hexahedron) and octahedron

Alfred_F — Fri, 08 May 2026 12:25:33 Z

To get better acquainted with "plot3d," I browsed through the help documentation. I was surprised to discover not only "Polyhedraplot," but—via "Polyhedra Sets" and "DualSet"—the very tools needed to tackle a classic subject: The duality of Platonic solids.
This reminded me of the following puzzle:
Consider the unit cube (edge length = 1) and, situated within it, its dual polyhedron (the octahedron). As is well known, the dual polyhedron of the octahedron is, in turn, a cube. Now, let us continue this dual construction indefinitely, starting from the unit cube (cube containing octahedron containing cube containing octahedron...). This generates a sequence of nested polyhedra—alternating between cubes and octahedra.
1.) For each of the infinite subsequences—that of the cubes and that of the octahedra—calculate the sum of all volumes and surface areas.
2.) What is the maximum volume an octahedron (regardless of its orientation) can have while being completely contained within the unit cube?

New book using Maple, published by SIAM

rcorless — Wed, 06 May 2026 16:49:26 Z

I am very pleased to announce the publication of my new book written together with Nic Fillion, "Perturbation Methods Using Backward Error", which uses Maple heavily throughout.

You can find it at

the SIAM bookstore

and I hope that you find it useful and interesting.

You can also find a paper in Maple Transactions, written with Michelle Hatzel, that explains how we generated the image that was chosen for the cover. Exploring Cover Designs for an Upcoming Book In the end, the SIAM design people chose a different one than we had thought, but they did pick one of the ones we generated!

This was fun to do.

New Maple Videos

pchin — Wed, 06 May 2026 15:12:24 Z

Over the past few months, I've created a number of short videos. My intention is to help people use Maple more effectively. I occasionally give workshops introducing Maple and its programming language, and many of the topics come from questions I get from the participants.

These can be found on our Youtube channel. Here are the ones posted so far.

What is a Workbook?
Creating a Workbook
How to Customize Your Maple Settings with the Options Dialog
What is Maple Transactions?
How to Submit an Article to Maple Transactions
Quotation Marks in Maple
Using Single Quotes to Prevent Evaluation

If you find these helpful and have suggestions for future videos, please leave a comment, thanks!