How to influence the size of a tikzpicture generated from Python using tikzplotlib?

Question

I have a tikzpicture generated in Python using tikzplotlib:

import numpy as np
import matplotlib.pyplot as plt
import tikzplotlib

vector = np.array([1, 2, 3])
plt.figure(figsize=(6, 4))
plt.plot(vector, vector)
tikzplotlib.save('test.tex')

Now if I change the figsize in Python, the image size in my Python environment will indeed change. But in a LaTeX document, where I import the tikzpicture using \input{test.tex}, the size is not changed. How can I define the size in either Python or LaTeX, without stretching the text/numbers as well, that should remain the standard size of the LaTeX text? The solutions mentioned in this question do not solve my problem.

Answer 1

As described in the Readme, tikzplotlib has the possibility of setting the width and/or height of the plots, using the figurewidth/figureheight keys for tikz_save:

tikz_save('someplot.tex', figureheight='5cm', figurewidth='9cm')

I believe that these lengths refer to the size of the axis box alone, not including ticklabels, axis labels and titles.

You can alternatively set the values to macros, and define lengths by those names in your document, i.e.

tikz_save(
    'someplot.tex',
    figureheight = '\\figH',
    figurewidth = '\\figW'
    )

and in your LaTeX document:

\documentclass{article}
\usepackage{pgfplots,amsmath}

\newlength\figH
\newlength\figW
\setlength{\figH}{4cm}
\setlength{\figW}{8cm}

\begin{document}

Some text, then a centred plot:

\begin{center}
\input{firstplot}
\end{center}

More text, then a wider plot:

\begin{center}
\setlength{\figW}{10cm} % when added inside the  center environment it has no effect outside it
\input{secondplot}
\end{center}

\end{document}

---

This is basically the same as for matlab2tikz (See my answer to tikz+matlab2tikz), except that the key is figurewidth/figureheight, instead of width/height.

Answer 2

In version 0.9.3 you seem to need axis_height and axis_width, rather than figureheight and figurewidth.