 values set for xMinRadius, xMaxRadius,
     yMinRadius and yMaxRadius.
      The default value is<code> 2</code>.</td><td class="summaryTableOwnerCol">Sparkline</td></tr><tr class=""><td class="summaryTablePaddingCol"><a name="style:markerStroke"></a>&nbsp;</td><td class="summaryTableInheritanceCol">&nbsp;</td><td class="summaryTableSignatureCol"><div class="summarySignature"><span class="signatureLink">markerStroke</span></div></td><td class="summaryTableDescription"><span class="label">Type: </span>mx.gr