ng-tooltips.html#cb220-11"></a><span class="co"># to generate a custom string (to appear in tooltip)</span></span>
<span id="cb220-12"><a href="controlling-tooltips.html#cb220-12"></a>text_y &lt;-<span class="st"> </span><span class="kw">number_si</span>(</span>
<span id="cb220-13"><a href="controlling-tooltips.html#cb220-13"></a>  w<span class="op">$</span>x<span class="op">$</span>data[[<span class="dv">2</span>]]<span class="op">$</span>y, </span>
<span id="cb220-14"><a href="controlling-tooltips.html#cb