el="anchor" href="#arg-dataprecision"></a></dt>
<dd><p>default NULL, permits rounding of the interval endpoints (added by Richard Dunlap). The data precision used for printing interval values in the legend returned by <code>findColours</code>, and in the <code>print</code> method for classIntervals objects. If intervalClosure is “left”, the value returned is <code>ceiling</code> of the data value multiplied by 10 to the dataPrecision power, divided by 10 to the dataPrecision power. The argument does not