\documentclass[a4paper]{article}

\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
%\tracingcommands=2\tracingmacros=2

	\begin{axis}[
		ymin=0,
	]
	\addplot+[only marks] table[x expr=\coordindex,y=v] {
		v 
		10 
		11 
		12 
		13 
	};

	\addplot[
		only marks,
	% Bad enough that the current revision of pgfplots has no
	% programmatic access to X and Y ...
		nodes near coords=\#\coordindex:\pgfmathprintnumber\V,
		scatter/position=absolute,
		visualization depends on=\thisrow{v} \as \V,
		every node near coord/.style={
			at={(axis cs:\coordindex,\V/2)},
			anchor=center,
		},
	] table[x expr=\coordindex,y=v] {
		v 
		10 
		11 
		12 
		13 
	};
	\end{axis}
\end{tikzpicture}
\end{document}

