Making bold tick labels in tikz

How do I make the tick labels bold? Here's a minimal example:

\documentclass[tikz,convert]{standalone}
\usetikzlibrary{datavisualization}
\begin{document}
\begin{tikzpicture}
\datavisualization[scientific axes,
x axis = {attribute=x,label,length=8.4cm},
y axis = {attribute = y, label},
visualize as scatter,
all axes = grid]
data{x,y
0, 3.655
2.40, 13.64
4 , 23.58
5, 44};
\end{tikzpicture}
\end{document}


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May be font=\bfseries in the options of tikzpicture? – Manuel Apr 2 '13 at 20:26
Welcome to TeX.sx! A tip: If you indent lines by 4 spaces, they'll be marked as a code sample. You can also highlight the code and click the "code" button (with "{}" on it). – cjorssen Apr 2 '13 at 20:33
Usually, we don't put a greeting or a "thank you" in our posts. While this might seem strange at first, it is not a sign of lack of politeness, but rather part of our trying to keep everything very concise. Accepting and upvoting answers is the preferred way here to say "thank you" to users who helped you. – cjorssen Apr 2 '13 at 20:35

It looks like this is a not-so-much polished area of the CVS version but here is one possiblity. I also noticed that some node style options are not passed properly so keep in mind that it is still in a work-in-progress status.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{datavisualization}

\begin{document}
\begin{tikzpicture}
\datavisualization[scientific axes,
all axes={grid,
ticks={tick typesetter/.code={%
\pgfmathparse{####1}%
$\mathbf{\pgfmathprintnumber{\pgfmathresult}}$%
}
}
},
x axis = {attribute=x,label,length=4cm},
y axis = {attribute = y, label},
visualize as scatter
]
data{x,y
0, 3.655
2.40, 13.64
4 , 23.58
5, 44};
\end{tikzpicture}
\end{document}


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