1

I am trying to plot the graphs of different surfaces, all of with are along the lines of "x + y + z = 1", but I cannot figure out how I would go about plotting these equations into latex. If there is a way to plot these graphs with out drawing the lines manually I would appreciate the assistance.

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  • Welcome to TeX.SX. Sorry, but so far I don't think I know what you want to do. I think it is not simply drawing the surface x+y+z=1 which would be very simple. Could you add least add a sketch of what would be the desired result by editing your question? Dec 8 '16 at 17:22
  • Implicit equations are not supported by TeX since it requires a CAS. But if you can get the data somehow from other software, pgfplots can draw the contour plots and so on.
    – percusse
    Dec 8 '16 at 17:28
  • Search the site. For example, this post has planes, or here you can find a plane and surface. If those are not what you want, a more specific question (along with your attempt) will be more likely to get people interested in helping.
    – DJP
    Dec 8 '16 at 17:39
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In this case it is easy, because you can invert the equation to

z(x,y) = 1 - x - y

This can be visualized with pgfplots.

\documentclass{article}

\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
  \begin{axis}
    \addplot3[surf] {1 - x - y};
  \end{axis}
\end{tikzpicture}

\end{document}

enter image description here

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