title: Euro-sign in ggplot: scales package
body: <p>I've noticed that, using the <code>scales</code> package, one can display dollars on an axis, using the <code>scales = dollar</code> option inside, for instance, <code>scale_y_log10()</code>. An option like <code>scales = euro</code> seems to be lacking. Is there an easy way for me to achieve the same effect?</p>