Save to Plot

Save Matlab data to PGFPlots

Suppose you have data (x,y) or (x,y,z) in Matlab. Now, you want to plot it in LaTeX using PGFPlots. These functions will help you.

Install

1. Download ZIP.
2. Extract it.
3. Copy files saveplot2d.m and saveplot3d.m to your code path.
4. Call functions saveplot2d or saveplot3d after your plot code.

Save PGFPlots 2D figure using data (x,y)

Usage

1. saveplot2d ( filename, x, y)
   Save all data from y(x) to filename.txt, and LaTeX code to filename.tex.

2. saveplot2d ( filename, x, y, sx )
   Save selected data from y(x) to filename.txt, and LaTeX code to filename.tex. Select x using sx.

Example in Matlab

x = linspace(0, 1, 101);
y = sin(10*x);

% Plot in Matlab
plot(x, y);

% Save PGFPlot figure with data
saveplot2d('fig1', x, y);
saveplot2d('fig2', x, y, 1:5:101);

Example in LaTeX

\documentclass{article}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}[
    xlabel={$x$},
    ylabel={$y$},
  ]
    \addplot[] table {fig1.txt};
  \end{axis}
\end{tikzpicture}

\end{document}

Save PGFPlots 3D figure using data (x,y,z)

Usage

1. saveplot3d ( filename, x, y, z )
   Save all data from z(x,y) to filename.txt, and LaTeX code to filename.tex.

2. saveplot3d ( filename, x, y, z, sx, sy )
   Save selected data from z(x,y) to filename.txt, and LaTeX code to filename.tex. Select x and y using sx and sy respectively.

Example in Matlab

x = linspace(0, 1, 101);
y = linspace(-1, 1, 201);
z = exp(-x'.^2 - y.^2);    % get z(x,y) as 101 x 201 matrix

% Plot 3D surface in Matlab
surf(x, y, z');

% Save PGFPlot figure with data
saveplot3d('fig3', x, y, z);
saveplot3d('fig4', x, y, z, 1:5:101, 1:5:201);

Example in LaTeX

\documentclass{article}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}[
    xlabel={$x$},
    ylabel={$y$},
    zlabel={$z$},
    view={60}{30},
  ]
    \addplot3[surf, mesh/rows=101] table {fig3.txt};
  \end{axis}
\end{tikzpicture}

\end{document}

License

This project is licensed under the MIT License.