@Traruh Synred 

have you tried the forget command on your routine to clear memory?

@FDS                                                                

@MagnusMJ 

Does the Maple.ini file change when you change options (under tools).

Possible file locations are described here help(worksheet,reference,initialization).

You can equally rename the Maple.ini file to test if Maple creates a new Maple.ini file at the next startup.

If it does, we know at least that the GUI can write to the file system.

The GUI is implemented in Java. Do you have other Java installions on your system?

Try also minimizing the Maple Window and change display settings. Maybe the file dialogues are placed out of screen bounds.

@MagnusMJ 

What happens if you click on a Maplefile like Download jrive_ex4.mw , do some changes and then save? Close all files and open the file via Recent documents.Did you use the default settings and folders during installation?

What does "save as" do? Do you get a file dialogue?

Can you at least save to Maplecloud (to My Files) or export files?

(Maplecloud, if it works, could be a temporary workaround.) 

@FDS 

I read

the number one minus a vector divided by a scalar Q0. How to substract a vector form a scalar?

It is the normal behavior of Maple that nothing happens when you press save in the sense that you do not see very much going on (on the GUI). You should not get a "Popup" (i.e. file dialogue) but the file is saved to its original name and location.

Please clarify that file contents does not change after applying changes to a file and pressing save.

Can you provide this Mathcad equation expression in standard math notation

If Q and H are supposed to be vectors, this expression does not make sense to me

Your parameters do not match.

• Le is not in the original equation
• D[t] and D[b] are not functions in the original equation

You have resolve this before substitution and simplification can be performed

I have added a benchmark you have posted to the information of my computer.

Quite intersting.
 

Download Maple_-_computer-info_with_benchmark_.mw

For me it looks like that the author is ignored. I.e.: the search you performed is the same as without Author.

@sand15 

I was about to say no and suggest image processing programs like ImageJ, but the program you suggest is much better for occasional work, since it includes a scaling option.

Works really well!

@Carl Love 

Now the rendering becomes nice.

With transparency polar surface contour plots are possible for quantitative interpretatioin of 3dplots.

👍

@Carl Love 

Up to 24 spokes (15-degree steps) you are right, above the grid shows less spokes and is not regular spaced (e.g. grid=[7,30]). At larger steps the polar grid looks more like a spider web.

Appart from that, it is less work than I expected and the rendering is acceptable (IMO). 
@Jamie128 : What do you think?

p1 := plot3d([r, theta, (csc(theta)/r)^2], r = 0 .. 2, theta = -Pi .. Pi, coords = cylindrical, style = surface, shading = zhue):
p2 := plot3d([r, theta, 0], r = 0 .. 3, theta = -Pi .. Pi, coords = cylindrical, grid = [7, 25], color = white, thickness = 2, glossiness = 0, shading = none):
(2*Pi*i)/24:
seq([3.5*cos(%), 3.5*sin(%), 0, %], i = 0 .. 23):
p3 := plots:-textplot3d([%]):
plots:-display(p1, p2, p3, view = [-4 .. 4, -4 .. 4, 0 .. 99], axes = framed);

I found this collection of Maple benchmarks (quick search).

A quite pragmatic approach which gives some insight.

I would add a dsolve and a pdf case (both numeric) and conclusive ways to measure.

Cases should be simple enough to fit in a code snippet region.

The biggest challenge would be a solution to collect cases and data.

I support the idea of bench marking.

@Jamie128 

You could generate three 3d-plots

• your function
• a polar grid with a z-axis
• labels made with textplot3d

and display them with plots:-display and the option axes=none.

This would look like this (without labels)

I used Carls plot combined with

plot3d([r, theta, 0], r = 0 .. 3, theta = -Pi .. Pi, coords = cylindrical, shading = zhue, view = 0 .. 99, shading = none).

The problem here is obvious: There is no control over the grid size of the polar grid.

The only way I can think of is to use plottools to generate all the rings and spokes of the polar grid yourself in 2d and transform them into 3d plot with plottools:-transform.

Quite some work which calls for a (selfmade) plot routine. Maybe someone capable can give us an idea how this should  be done.