TikZ PGF: How to draw crater-like 3D surface based on polynomial equations?
Assumed we have some kind of squared 3D graph like this one:
Minimum Working Example (MWE):
documentclass{standalone}
usepackage{tikz, pgfplots}
begin{document}
begin{tikzpicture}
begin{axis}[samples=20]
addplot3[surf, domain=-2:2] {-x^2-y^2};
end{axis}
end{tikzpicture}
end{document}
Screenshot of the result:
How can I replace the current graph with some 4th degree polynomial formula in both directions x and y, e.g. -1/3*x^4+x^2 and -1/3*y^4+y^2?
Draft of the desired result
In the end it should look like that:
The draft is more or less a circular volcano with a crater in the middle, I hope you can imagine. :-)
I don't know why, but several approaches with...
addplot3[surf, domain=-2:2] {(-1/3*y^4+y^2)*(-1/3*y^4+y^2)};
... do not show up like I expected.
tikz-pgf pgfplots 3d tikz-3dplot tikz-3d
asked 12 mins ago
DaveDave
747516
add a comment |
Assumed we have some kind of squared 3D graph like this one:
Minimum Working Example (MWE):
documentclass{standalone}
usepackage{tikz, pgfplots}
begin{document}
begin{tikzpicture}
begin{axis}[samples=20]
addplot3[surf, domain=-2:2] {-x^2-y^2};
end{axis}
end{tikzpicture}
end{document}
Screenshot of the result:
How can I replace the current graph with some 4th degree polynomial formula in both directions x and y, e.g. -1/3*x^4+x^2 and -1/3*y^4+y^2?
Draft of the desired result
In the end it should look like that:
The draft is more or less a circular volcano with a crater in the middle, I hope you can imagine. :-)
I don't know why, but several approaches with...
addplot3[surf, domain=-2:2] {(-1/3*y^4+y^2)*(-1/3*y^4+y^2)};
... do not show up like I expected.
tikz-pgf pgfplots 3d tikz-3dplot tikz-3d
asked 12 mins ago
DaveDave
747516
add a comment |
Assumed we have some kind of squared 3D graph like this one:
Minimum Working Example (MWE):
documentclass{standalone}
usepackage{tikz, pgfplots}
begin{document}
begin{tikzpicture}
begin{axis}[samples=20]
addplot3[surf, domain=-2:2] {-x^2-y^2};
end{axis}
end{tikzpicture}
end{document}
Screenshot of the result:
How can I replace the current graph with some 4th degree polynomial formula in both directions x and y, e.g. -1/3*x^4+x^2 and -1/3*y^4+y^2?
Draft of the desired result
In the end it should look like that:
The draft is more or less a circular volcano with a crater in the middle, I hope you can imagine. :-)
I don't know why, but several approaches with...
addplot3[surf, domain=-2:2] {(-1/3*y^4+y^2)*(-1/3*y^4+y^2)};
... do not show up like I expected.
tikz-pgf pgfplots 3d tikz-3dplot tikz-3d
asked 12 mins ago
DaveDave
747516
Assumed we have some kind of squared 3D graph like this one:
Minimum Working Example (MWE):
documentclass{standalone}
usepackage{tikz, pgfplots}
begin{document}
begin{tikzpicture}
begin{axis}[samples=20]
addplot3[surf, domain=-2:2] {-x^2-y^2};
end{axis}
end{tikzpicture}
end{document}
Screenshot of the result:
How can I replace the current graph with some 4th degree polynomial formula in both directions x and y, e.g. -1/3*x^4+x^2 and -1/3*y^4+y^2?
Draft of the desired result
In the end it should look like that:
The draft is more or less a circular volcano with a crater in the middle, I hope you can imagine. :-)
I don't know why, but several approaches with...
addplot3[surf, domain=-2:2] {(-1/3*y^4+y^2)*(-1/3*y^4+y^2)};
... do not show up like I expected.
tikz-pgf pgfplots 3d tikz-3dplot tikz-3d
tikz-pgf pgfplots 3d tikz-3dplot tikz-3d
asked 12 mins ago
DaveDave
747516
asked 12 mins ago
DaveDave
747516
edited 5 mins ago
Dave
asked 12 mins ago
DaveDave
747516
asked 12 mins ago
DaveDave
747516
asked 12 mins ago
DaveDave
747516
747516
add a comment |
add a comment |
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