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

Dear Maple users

I am defining various geometrical items in the plottools package and finally plot them using the display command. Let's say I have defined:

Circle1:=circle(...):

Circle2:=circle(...):

Line1:=line(...):

etc.

and finally want to plot them with the display command:

display(Circle1,Circle2,Line1,...)

It works, however sometimes I only want some of these items to be plotted. Certain variables at the beginning of the document do control if those items should be plotted or not. Let's say a variable CircleOrNot can be set to have the values "no" or "yes", and if I set it to "yes", it should plot it and if the value is "no", it should not plot it. I know that I can make a conditional statement in the end when dealing with the display command, but it can be quite a mess (condition after condition ...).

What I would like is making a conditional assignment like the following:

If CircleOrNot="yes" then Circle1:=circle(...) else Circle1:=null end if

or something like that, and afterwards use the full display command including all objects:

display(Circle1,Circle2,Line1,...)

But it does not work. I receive an error. There doesn't seem to be an empty statement, which will just be ignored by the display command. How can I do it? Probably someone has a good way to handle this situation.

Best regards,

Erik

Dear Maple users

I have a question which may seem very simple, but for some reason I have not been able to find a solution to it in Maple:

If plotting a function in Maple by specifying an x-range, but not a y-range, Maple will somehow find a reasonable y-range itself. That's basic stuff. But how do I ensure that this y-range contains the value 0, and Maple still decide the min and max by itself? I could set it myself, but my worksheet require that it is done automatically independent of the given function at hand. 

Erik

Dear Maple users

As a followup on my recent question about how to count the number of characters in a string containing special Danish characters here: https://www.mapleprimes.com/questions/236478-How-To-Count-Length-Of-String-When-Special

I also need to handle substrings from a string in my work in Cryptography. In my attached file I present an example with a string containing two special characters. The problem is however, that I need to access individual characters in the string. Normally I would do so by using the command substring. As indicated in the file it doesn't work very well, because the special characters are represented by TWO elements (bytes)!

Is there a smart way to create a new command named SUBSTRING to accompanying the great LEN command suggested by vv?

Regards,

Erik V.

substrings.mw