# circle node on an ellipse

I want to put this node on an ellipse at about the 35% mark

\node[draw, circle, inner sep = .08cm, scale = .75] (location) {2};

\documentclass{article}
\begin{document}
\usepackage{tikz}
\usetikzlibrary{arrows, decorations.markings, decorations.pathreplacing}
\begin{tikzpicture}
\begin{scope}[decoration = {markings, mark = at position 0.3 with {\arrow{>}},} ]
\clip (-5,0) rectangle (1,2.5);
\draw[postaction = decorate] (-2,0) ellipse (3cm and 2cm);
\end{scope}
\end{tikzpicture}
\end{document}


How could I achieve this?

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@PeterGrill I mean path length – dustin Mar 29 '13 at 22:30
@PeterGrill there isn't a way to do this in tikz without doing the math? Like I have done with the arrow placement? – dustin Mar 29 '13 at 22:34

You can use the markings library that you used for placing the arrow to also place the node:

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{arrows, decorations.markings, decorations.pathreplacing}

\begin{document}
\begin{tikzpicture}
\begin{scope}[
decoration = {
markings,
mark = at position 0.3 with {\arrow{>}},
mark = at position 0.3 with {\node[draw, circle, inner sep = .08cm, scale = .75] (location) {2};}
} ]
\clip (-5,0) rectangle (1,2.5);
\draw[postaction = decorate] (-2,0) ellipse (3cm and 2cm);
\end{scope}
\end{tikzpicture}
\end{document}

-
Maybe also mentioning to use an ellipse shaped node referral with an angle anchor would be useful. Oh wait I just did :P – percusse Mar 29 '13 at 23:04