I'm very new to the TikZ environment. I'm trying to replace the "4" in the following graph by a Greek letter (ideally a \tau^{*}
). Any idea ?
Thanks in advance
\begin{document}
\begin{tikzpicture}[
declare function={
gamma(\x)= 0.25*\x*\x*exp(-0.5*\x);
}
]
\begin{axis}[
no markers, domain=1:13, samples=200,
axis lines*=left, xlabel=$\tau$, ylabel=$V(\tau)$,
every axis y label/.style={at=(current axis.above origin),anchor=south},
every axis x label/.style={at=(current axis.right of origin),anchor=west},
xtick={4}, ytick=\empty,
enlargelimits=false, clip=false, axis on top,
grid = major,
xmin=0, ymin=0,
]
\addplot [very thick,cyan] {gamma(x)};
\end{axis}
\end{tikzpicture}
\end{document}