# Using 'semilogyaxis' with 'groupplot' in PGFPlots

Using groupplot library of PGFPlots, the command \nextgroupplot can take the parameters that \begin{axis} used to take. So giving it the option "ymode=log" should effectively make the plot a semilogyaxis plot. However I do get an error when I do that:

Missing number, treated as zero.

This is strange because it works find if I gave it xmode=log it runs without errors (although giving an empty plot instead).

The minimum running example follows:

\documentclass[11pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage{tikz}
\usepackage{pgfplots}

\usepgfplotslibrary{groupplots}

\begin{document}
\begin{tikzpicture}[scale=0.6]
\begin{groupplot}[ group style={group name=my plots, group size=2 by 1}, ymax=1, restrict y to domain=0:1]
\nextgroupplot[ymode=log]%

\nextgroupplot%
\end{groupplot}
\end{tikzpicture}
\end{document}


The equations used to plot normally in a semilogyaxis, but I wanted them in a groupplot. So the function domain and so should not be the problem.

-

You mustn't restrict the domain for the y axes. The logarithm is not defined for zero. The following works for me.

\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepgfplotslibrary{groupplots}

\begin{document}
\begin{tikzpicture}[scale=0.6]
\begin{groupplot}[%
group style={%
group name={my plots},
group size=2 by 1
},
ymax=1,
%      restrict y to domain=0:1   % <<<<< This is not allowed
]
\nextgroupplot[ymode=log]%