title: PHPExcel chart using logarithmic scale
body: <p>Using PHPExcel 1.8.1 to create a chart. However I am not able to find the option to enable logarithmic scaling on said chart. These are the axis properties I have found apigen.juzna.cz/doc/PHPOffice/PHPExcel/source-class-PHPExcel_Chart_Axis.html#175, but don't seem to address what I am looking for:</p>
  
  <p><code>$xAxisStyle =  new PHPExcel_Chart_Axis();
  $xAxisStyle-&gt;setAxisOptionsProperties('low', null, null, null, null, null, null, null, null, null);</code> </p>
  
  <p>This is the chart that is created:
  <a href="https://i.stack.imgur.com/Mffqp.png" rel="nofollow noreferrer">Typical line chart, with with ranges too great to display all points</a></p>
  
  <p>After chart is created, I then enable logarithmic scale on the axis to display it properly:
  <a href="https://i.stack.imgur.com/0xaiI.png" rel="nofollow noreferrer">Edited line chart so all lines are displayed</a></p>
  
  <p>Can PHPExcel perform logarithmic scaling and I am missing it or is there some other type of work-around?</p>