[Tex/LaTex] Configure the Matplotlib figure size so that the font within the graphics matches the font in the text

graphics

I would like to configure the size of a figure produced by Matplotlib so that the font within the graphics matches the font size in the text.

The following Python script produces the figure using Tex fonts.

import numpy as np
import pylab as pl
import matplotlib

matplotlib.rcParams["text.usetex"] = True
matplotlib.rcParams["font.family"] = "serif"
matplotlib.rcParams["font.size"] = "18"

x = np.linspace(0.0, 2.0 * np.pi, 1000)
y = np.sin(x)
#
pl.figure(figsize=(4, 3))
pl.plot(x, y, "-")
pl.xlabel("x")
pl.ylabel("y")
pl.title("The sine function")
pl.savefig("sine-function.pdf", bbox_inches="tight")

Then I created a LaTeX document which inserts this figure.

\documentclass{article}
\usepackage[pdftex]{graphicx}
\usepackage{lipsum}
\begin{document}
\begin{center}
\includegraphics[width=\textwidth]{sine-function.pdf}
\end{center}
\lipsum[1]
\end{document}

This produces:

The figure is much larger than required. I could downsize it e.g. with width=0.5\textwidth, but this is unsatisfactory, because, no matter how I set the width parameter, I cannot be sure that the font size in the text matches the font size in the figure.

How to configure this correctly?

Best Answer

The trick is to configure the font size correctly right from Matplotlib. The correct script is the following. The font size is set to 10. In order to produce a correct graph, I add to downsize the figure with the figsize argument.

import numpy as np
import pylab as pl
import matplotlib

matplotlib.rcParams["text.usetex"] = True
matplotlib.rcParams["font.family"] = "serif"
matplotlib.rcParams["font.size"] = "10"

x = np.linspace(0.0, 2.0 * np.pi, 1000)
y = np.sin(x)
#
pl.figure(figsize=(2.0, 1.5))
pl.plot(x, y, "-")
pl.xlabel("x")
pl.ylabel("y")
pl.title("The sine function")
pl.savefig("sine-function.pdf", bbox_inches="tight")

Then I used the following tex document. Since the font size in the PDF is 10, I do not have to change its width.

\documentclass{article}
\usepackage[pdftex]{graphicx}
\usepackage{lipsum}
\begin{document}
\begin{center}
\includegraphics{sine-function.pdf}
\end{center}
\lipsum[1]
\end{document}

This produces:

which is the correct result.

Related Solutions

[Tex/LaTex] Get the size that a figure is being rendered

The literal method for doing this looks something like as follows:

\usepackage{calc}
...
\def\mygraphic{\includegraphics{...}}

\newlength\graphicheight
\setlength\graphicheight{\heightof{\mygraphic}}
% OR: \settoheight\graphicheight{\mygraphic}
...
\mygraphic % to insert the graphic
...
\vspace{\graphicheight} % whitespace same size as the graphic

But there is also the \phantom command which creates an empty box of the same size as its contents, which might suit your specific circumstances better:

\mygraphic % insert the graphic
...
\phantom{\mygraphic} % insert a blank box of the same size

Additionally, \includegraphics takes a draft option to replace individual images by placeholders, so

\def\mygraphic\{includegraphics[draft]{...}}

might perform better than including the actual image.

[Tex/LaTex] how to set the canvas and font size in TikZ

For the sizes, you can use the current bounding box together with \pgfgetlastxy:

\documentclass{standalone}
\usepackage{tikz}

\newcommand*{\ExtractCoordinate}[3]{\path (#1); \pgfgetlastxy{#2}{#3};}%

\newdimen\tlx
\newdimen\tlx
\newdimen\brx
\newdimen\bry


\begin{document}
\begin{tikzpicture}
    \draw (-3,-1) rectangle (3,1) (-2,-2) rectangle (2,2);
    \foreach \x in {north west,south west,south east,north east}
    {   \fill[red] (current bounding box.\x) circle (0.01);
    }
    \ExtractCoordinate{current bounding box.north west}{\tlx}{\tly}
    \ExtractCoordinate{current bounding box.south east}{\brx}{\bry}
    \pgfmathsetmacro{\myheight}{(+\tly-\bry)/28.452755}
    \pgfmathsetmacro{\mywidth}{(-\tlx+\brx)/28.452755}
    \node[below right] at  (-2,1) {height: \myheight\ cm};
    \node[above left] at  (2,-1) {width: \mywidth\ cm};
\end{tikzpicture}
\end{document}

enter image description here

Edit 1: Ah, now I get it. Here is a still not automatic version. You set two commands in each tikzpicture: \maximumdimensions{4}{3}, which is the desired width and height, at the beginning of the picture. \getscalingfactors which will draw nodes with a recommended scaling factor in the middle of your picture if the image if to high/wide:

\documentclass{scrartcl}
\usepackage{tikz}
\usepackage{lipsum}
\usepackage{xifthen}

\newcommand*{\ExtractCoordinate}[3]{\path (#1); \pgfgetlastxy{#2}{#3};}%

\newdimen\tlx
\newdimen\tlx
\newdimen\brx
\newdimen\bry
\def\xscalefactor{}
\def\yscalefactor{}
\parindent0mm

\newcommand{\getscalingfactors}{%
    \ExtractCoordinate{current bounding box.north west}{\tlx}{\tly}
    \ExtractCoordinate{current bounding box.south east}{\brx}{\bry}
    \pgfmathsetmacro{\myheight}{(+\tly-\bry)/28.452755}
    \pgfmathsetmacro{\mywidth}{(-\tlx+\brx)/28.452755}
    \pgfmathsetmacro{\xsf}{\maxwidth/\mywidth}
    \pgfmathsetmacro{\ysf}{\maxheight/\myheight}
    \global\edef\xscalefactor{\xsf}
    \global\edef\yscalefactor{\ysf}
    \pgfmathtruncatemacro{\xsfc}{\xsf*10000}
    \pgfmathtruncatemacro{\ysfc}{\ysf*10000}
    \ifthenelse{\xsfc > 10000}{}{\node[fill=white,above] at (current bounding box.center) {x-s: \xsf};}
    \ifthenelse{\ysfc > 10000}{}{\node[fill=white,below] at (current bounding box.center) {y-s: \ysf};}
}

\newcommand{\maximumdimensions}[2]{% width, height
\global\edef\maxwidth{#1} % in cm
\global\edef\maxheight{#2} % in cm
}

\begin{document}

\begin{tikzpicture}[scale=1]
    \maximumdimensions{4}{3}

    \draw[fill=orange] (-3,-1) rectangle (3,1) (-2,-2) rectangle (2,2);

    \getscalingfactors
\end{tikzpicture}

\lipsum[1]

\begin{tikzpicture}[scale=1]
    \maximumdimensions{4}{3}

    \draw[fill=orange!50!gray] (0,0) circle (3);
    \draw[fill=red!50!gray] (3,1) circle (1);
    \draw[fill=blue!50!gray] (-2,2) circle (1);
    \draw[fill=green!50!gray] (-3,-2) circle (1);
    \draw[fill=yellow!50!gray] (2,-1) circle (1);

    \getscalingfactors
\end{tikzpicture}

\end{document}

enter image description here

If you scale the picture down enough, the nodes inside the picture vanish: \begin{tikzpicture}[scale=0.66] and \begin{tikzpicture}[scale=0.497]

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Get the size that a figure is being rendered

[Tex/LaTex] how to set the canvas and font size in TikZ

Related Question