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                <div id='description'>
  <h3><code>TickFormatIndex();  TickFormatValue();</code></h3>
  <p>Set the tick label format for index and value. For instance the label can be set to a certain decimal point, currency or SI prefix. Formats can be found on d3-format github <a href = '' target='_blank'>website.</a></p>
  <p>The chart below has tick value set to currency and rounding off to 1 significant figure and the tick index is set to 2 decimal places.</p>
  <div id='chart'></div>


  margin: 1em;


//Set the tick label for index and value to different formats 
//The example below has the tick for value set to pound sterling and 1 significant figure and index to 2 decimal places.

let chart = d3_rs_lines.html()
    .tickFormatIndex('.2f') //set index to 2 decimal places
    .tickFormatValue('$.1s'); //add currency and round to 1 significant figure'#chart').datum([3000,4000,10000,7000,5000]).call(chart);