Solved: Re: Plot values on scale

FC_10037391 · ‎Apr 25, 2023

I want to have the plot values on scale directly and not modify the scale within plot is it possible in 15?

Werner_E · ‎Apr 27, 2023

OK, I see the problem but unfortunately because of a bug in Mathcads 3D component I can't offer a satisfying solution.

When you calculate Z and later plot it, all information about the original values X and Y is lost, so the best Mathcad can do is to use the matrix indices.

The usually preferred way is to plot a function. And using "CreateMesh" gives you better control than plotting the function directly.

But because the 3D plot is buggy (maybe it does not like large values for x and y ?) we see some nasty artefacts.

Actually on my screen it looks even worse:

I don't know how to fix this - maybe someone else has some ideas on this.

Maybe its just the installation on my machine, so try the attached file yourself.

I also tried to plot the function directly

Look good, but Mathcad had automatically chosen the default values for x and y running from -5 to 5.

We can change this in the "3-D Plot Format" menu

and when I do this, I see this

So give it a try yourself - maybe its just my graphics driver, graphics card, OS, ....?

View solution in original post

Werner_E · ‎Apr 25, 2023

@FC_10037391 wrote:

I want to have the plot values on scale directly and not modify the scale within plot is it possible in 15?

Please be more specific about what you would like to accomplish.

Actually I have no idea what you may be talking about.

Raiko · ‎Apr 26, 2023

I guess you want to change axis settings without going "into" the graph. See here a Mathcad 15 file.

FC_10037391 · ‎Apr 27, 2023

I wanted to have scatter plot to show X and Y values that correspond to variable they represent and not indices. I am looking the type of values changes and not indices

Werner_E · ‎Apr 27, 2023

OK, I see the problem but unfortunately because of a bug in Mathcads 3D component I can't offer a satisfying solution.

When you calculate Z and later plot it, all information about the original values X and Y is lost, so the best Mathcad can do is to use the matrix indices.

The usually preferred way is to plot a function. And using "CreateMesh" gives you better control than plotting the function directly.

But because the 3D plot is buggy (maybe it does not like large values for x and y ?) we see some nasty artefacts.

Actually on my screen it looks even worse:

I don't know how to fix this - maybe someone else has some ideas on this.

Maybe its just the installation on my machine, so try the attached file yourself.

I also tried to plot the function directly

Look good, but Mathcad had automatically chosen the default values for x and y running from -5 to 5.

We can change this in the "3-D Plot Format" menu

and when I do this, I see this

So give it a try yourself - maybe its just my graphics driver, graphics card, OS, ....?

FC_10037391 · ‎Apr 29, 2023

This looks great, thank you so much i think the higher value is causing the streak to pop out within plot it that so? Because when the values are lowered it does not seem to create that annoying line in plot

Werner_E · ‎Apr 29, 2023

So you say that its not just on my side but that you experience that bug as well?

Not sure what exactly causes it - it may be the high values and I noticed, too, that when the function values are divided by something like 10^4 the bug does not show up.

Its sure a bug as it should work, but nobody will fix a bug in MC15 anymore 😞