@WD0HHU I am not sure why the embedded zoomed/scaled plot loses its dimensions, sorry. (It seems related to being in an embedded Task Region, but didn't happen for at least one shorted example I'd tried).

You can manually zoom-in on the PZ plot, displayed in the usual manner rather than with InsertContent ,etc, as an alternative way to reduce the plot-title gap. It's a little extra manual effort, but it seems to do better on Close/Reopen:  AGAM_ac.zip

@studentX369 You can first do a shortcut to get a fresh/empty prompt.

@WD0HHU Could you attach an example?

@MichaelVio You're not using all the amended files from my earlier Reply. They have edits by me that allow their problematic plots to attain better.

@Preben Alsholm I too have been unable to Delete (as) Spam.

I notice that I also cannot delete/disable tags (duplicates, etc).

@MichaelVio Make sure it is being entered in 1D Input mode. The F5 key will change the mode, if the cursor is on a line in an Execution Group. Or you can change it with the cursor on an input and use the right-click menu.

One doesn't "close" (or remove a Question). You may, at your discretion, with give an Answer an up-vote (Thumbs up icon) or mark it as best/accepted (cup icon), each at its top-right.

@MichaelVio 

In the PlanckML.mw there was as assignment,
    E(nu) := %;
that was actually in 2D Input (despite being in red). That gets parsed as a procedure/operator definition in 2D Input mode. But the rest of your code (and other sheets) do it with the intention of being a forced (remember table) assignment to E(nu).

That's a reason why I'd like to know whether the plots are expected, in at least a qualitative sense. I am distrustful of this function call approach.

In all three sheets there were a few things related to working-precision and accuracy.

PlanckML_ac.mw
Aud2e_ac.mw
plkG_ac.mw

@eithne The Delete (as) Spam facility is not working since the outage, unfortunately.

That mechanism disables the account of the poster, so that they cannot so easily re-post. It also removes the user Profile (which often has additional spam URLs in it.)

ps. While I'm at it, there is another recent problem with the site, unrelated to the outage, but I don't know how to report it effectively: Answers with no votes (or the same number of votes) are now wrongly ordered top-to-bottom in reverse wrt the date posted. For years it worked properly, but now it's wrong. It's "top-posting" them, putting the most recent one at the top.

What do you think is the value of E(0)?

What is the relationship you are trying to use, between say v(k+1) and v(k)? Is it a recursive formula?

You haven't provided either an intended formula (recursive or not) or a sample of the expected series (output values). Please supply the relevant details.

ps. Let us know whether you're using 2D Input mode, because then preliminary values could be code in a conditional within the procedure instead of using suntax like v(k):=1 which gets parsed as a clobbering procedure definition.

@ashy In Maple 18 it does not do all additional simplification steps in the same way.

Download end_M18.mw

@jalal Is this the kind of effect you're after?

S5_Périodique_Rôlede_C_ac.mw
 

ps. Here I am using the other kind approach that I mentioned at the start of my Answer, where the animating variable simply takes on integer values. The integer value gets scaled by the increment, wherever used.

pps. It's not most efficient to repeatedly call plot like this. You could instead simply call plot once, up front, and then translate the plot horizontally. But for this example it's not too slow to create the animation as you've done.

@Arya-S-AA Only you can explain what "best" means to you.

@Arya-S-AA For some choices of values for the parameters the expression might not be finite/defined for all x and y, or throw a division-by-zero.

If that happens at the end-points (some combinations of which Explore tries, up-front) then you see the warning generated when the plot3d returns empty or fails.

In your example you might just ignore that warning.

Or you could suppress all warnings (which I won't show; it might hide some more serious mistake, in your future attempts).

Or, for this example you might adjust some of the parameter ranges a little.
p-not_ac2.mw

@jalal I don't understand what you are saying, sorry.

Here's an idea: Forget all about animation, just for a moment. Show what you want (both blue and red curves) in a completely static plot, when C=Pi/4. And then show in another static plot what you want when C=5*Pi/3.