Axis scaling issue with external graphics

Question

I was referring to the following posts

1: Image with axis, [2]: pgfplots axis enlargelimits

I was trying to fit my image in a defined axis. Unfortunately, the image is not scaling correctly(aspect ratio always changes). The image is as below,(i take it as a pdf for my tikz picture)

MWE:

\documentclass{standalone}
\usepackage{pgfplots}
\begin{document}
    \begin{tikzpicture}
    \begin{axis}[%small, 
    axis equal image,
    enlargelimits=false,
    axis on top,
    axis equal=false
    ]
    \addplot graphics [xmin=0,ymin=0,xmax=10,ymax=2] {fig1.pdf};
    \end{axis}
    \end{tikzpicture}
\end{document}

And the not so MWE version(if needed)

%\documentclass{standalone}
%
%\usepackage{pgfplots}
%
%\begin{document}
%  \begin{tikzpicture}
%    \begin{axis}[
%        axis on top,% ----
%        width=5cm,
%        scale only axis,
%        enlargelimits=false,
%        xmin=0,xmax=10,
%        xlabel={Length($mm$)},
%        xtick={0,2,4,6,8,10},
%        xticklabels={0,2,4,6,8,10},
%           scaled ticks=false,
%           axis equal image,   
%        ymin=0,ymax=2,
%        ylabel={Length($mm$)},
%        ytick={0.1,0.5 ,1,1.5,2},
%        yticklabels={0.1,0.5 ,1,1.5,2},
%        axis equal=false,
%        axis equal image,
%        ]
%
%      \addplot[thick,blue] graphics[xmin=0,ymin=0,xmax=10,ymax=2] {fig1.pdf};
%    \end{axis}
%  \end{tikzpicture}
%\end{document}

We need code we can use to reproduce the problem. Since only you have fig1.pdf, nobody but you can compile the code to diagnose or troubleshoot. — cfr, Aug 17 '17 at 10:51
I copied your image and it worked fine. You do realize that axis equal image and axis equal=false cancel, and neither is needed. If you want a specific aspect ratio, set the width and height using scale axis only. — John Kormylo, Aug 17 '17 at 16:06
BTW, the default size of this image is about 97 by 45 inches. It still works but the tick labels are too small to be visible. — John Kormylo, Aug 17 '17 at 16:18

score 0 · Accepted Answer · answered Aug 17 '17 at 16:33

The following preserves the original aspect ratio, but scales it down to a given width (4in). You will need to change the pathname for your system.

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

\sbox0{\includegraphics[width=4in]{images/7PuiQ}}%

    \begin{tikzpicture}
    \begin{axis}[%small, 
    scale only axis, width={\wd0}, height={\ht0},
    enlargelimits=false,% not needed
    axis on top,
    ]
    \addplot graphics[xmin=0,ymin=0,xmax=10,ymax=2] {images/7PuiQ};
    \end{axis}
    \end{tikzpicture}
\end{document}

Axis scaling issue with external graphics

1 Answers1