Dear Maple users

I can easily draw a sphere with the following command:

plot3d(1, t = -Pi .. Pi, p = 0 .. Pi, coords = spherical)

Let's say I want to change the number of latitude circles so that there is one for every 10 degrees? Longitude circles are given for every 15 degrees, which is appropriate - corresponding to one for every hour! But in general: Is there a way to change the number of circles of both types? Or maybe you need to piece together a plot of several kinds of plots?

Erik

Dear Maple users

Is there a way in Maple to create a sphere with a texture similar to that of the Earth (UV mapping maybe?). I plan to later add mathematically defined spatial curves to the sphere to study differential geometry aspects.

Erik

Dear Maple users

I can plot a pin diagram for the binomial distribution for say n = 20 and p = 0.3. It is one-dimensional, since only the number r of successes is relevant. Now I want to plot a diagram for the multinomial distribution for 3 categories. This means a two dimensional distribution. Let's say n = 20, p1 = 0.2, p2 = 0.5 (then p3 = 1 - p1 - p2 = 0.3). How do I make this plot? Pin diagram, but maybe even better: A Bar Chart. 

I hope someone can help.

Erik

Dear Maple users

I have an Interactive Planck Curve working great in Maple 2023, but not in Maple 2024 and 2025. Can you explain why? When I drag in the Temperature slider it fails with the window: (in plottools:-getdata) range out of bounds. 

Is it a bug or has some command changed?

File attached.

Kind regards,

Erik

Planck_Curve.mw

Dear Maple users

I am using the LinearInterpolation command from the Interpolation package. When I however want to integrate the result from one number to another, I only receive an abstract result. It is probably an easy question, but somehow I can't figure it out. I tried using MakeFunction and evalf command in order to receive a number for the integral. I hope someone can help.

Erik

Download Using_interpolation.mw