MaplePrimes - Newest Questions

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?

Deleting a column from a DataFrame?

nmacsai — Tue, 05 May 2026 15:21:10 Z

Is the implementation of DataFrames in Maple antiquated compared to PANDAS or other modern implementations of DataFrames? Even doing the most basic tasks is extremely difficult or unintuitive. I have lived in the DataFrame help pages for 5 years and I still can't delete a column from a DataFrame. Will I ever get any work done?

delete_a_dataframe_column.mw

Color option in context-panel

Geoff — Mon, 04 May 2026 04:53:53 Z

Color option in Context Panel does not work

Steps to Reproduce:
1. Create or open a histogram.
2. Try to change its color using the Color option in the Context Panel.
3. Observe that the color does not change.
4. Click outside the histogram.
5. Click back on the histogram.
6. Try the Color option again — now it works.

Expected Behavior:
The Color option should work immediately when applied to the histogram, without requiring extra clicks.

Actual Behavior:
The Color option only works after clicking outside the histogram and then reselecting it.

This evalb behavior seems like an error

Mike Mc Dermott — Mon, 04 May 2026 00:27:37 Z

In my opinion both these expressions should return false.