# Pgfplots grid not showing

I'm having trouble with setting up a grid for this plot using pgfplots.

Here's my code.

\documentclass{article}
\usepackage{pgfplots}

\begin{document}
\begin{tikzpicture}[
/pgf/declare function = {
signal = 0.8 * (sin(deg(x)) + 0.7*sin(2*deg(x)) + 0.7*sin(3*deg(x)));
}
]

\begin{axis}[
grid = minor,
height= 0.35\textwidth,
width = 0.8\textwidth,
thick,
scale=1.8,
axis lines=center,
domain=0:20*pi,
samples=500,
line join=bevel,
xlabel=t,
ymax=2.7,
ymin=-2.7,
xmax=25.9,
xmin=0,
xtick=\empty,
ytick=\empty,
]

\end{axis}
\end{tikzpicture}
\end{document}


Is this problem related to the setting of the axis lines?

• Welcome to TeX.SE. Thanks for providing most of the required code. But, for future reference, it is always best to compose a fully compilable MWE that illustrates the problem including the \documentclass and the appropriate packages. – Peter Grill Jun 5 '14 at 2:27
• you could change your xtick=\empty to, for example, minor xtick={0,2,...,60}, – cmhughes Jun 5 '14 at 2:40

If you want to see the grid do not say xtick=\empty and/or ytick=\empty. Use xticklabels=\empty and yticklabels=\empty to not show the ticklabels, major thick length=0 and minor thick length=0 to not show the ticks.

You only want to see the minor grid? Or both? For the minor grid you have to set a minor tick num. In the following example I use both grids with minor thick num=3 and I color the major grid red.

\documentclass[margin=5pt]{standalone}
\usepackage{pgfplots}

\begin{document}
\begin{tikzpicture}[
/pgf/declare function = {
signal = 0.8 * (sin(deg(x)) + 0.7*sin(2*deg(x)) + 0.7*sin(3*deg(x)));
}
]

\begin{axis}[
grid = both,
minor tick num=3,
every major grid/.style={red, opacity=0.5},
height= 0.35\textwidth,
width = 0.8\textwidth,
thick,
scale=1.8,
axis lines=center,
domain=0:20*pi,
samples=500,
line join=bevel,
xlabel=t,
ymax=2.7,
ymin=-2.7,
xmax=25.9,
xmin=0,
xticklabels=\empty,
yticklabels=\empty,
major tick length=0pt,
minor tick length=0pt,
%xtick=\empty,
%ytick=\empty,
]