PGFPlots only have one 0 at the origin

Question

When I create a figure using tikzpicture, tikz adds two 0's at the origin for a plot (one for the x-axis and another for the y-axis). I think it looks cleaner to only have one zero at the origin. I don't want to manually adjust xtick and ytick and was hoping for a smarter way to do this. Did I miss something in the PGFPlots manual?

Thanks!

Answer 1

There's no built-in code for this, but you can create a style to do it if you want. Here, I've created ignore zero which accepts a single argument: the axis for which the zero ticklabel will not be plotted:

\pgfplotsset{ignore zero/.style={%
  #1ticklabel={\ifdim\tick pt=0pt \else\pgfmathprintnumber{\tick}\fi}
}}

That just compares the current value of \tick on the specified axis to zero. If it is zero, we do nothing; if it's not zero, proceed with normal ticklabel typesetting (\pgfmathprintnumber{\tick}). Here's an example showing both possibilities (ignoring either x or y):

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.12}
\pgfplotsset{ignore zero/.style={%
  #1ticklabel={\ifdim\tick pt=0pt \else\pgfmathprintnumber{\tick}\fi}
}}

\begin{document}
\begin{tikzpicture}
\begin{axis}[xmin=0,ymin=0,domain=0:5,ignore zero=x]
  \addplot {x};
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[xmin=0,ymin=0,domain=0:5,ignore zero=y]
  \addplot {x};
\end{axis}
\end{tikzpicture}
\end{document}