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                <div id='description'>
  <p>Change the points connecting the line chart into different symbols.</p>
  <p>The line chart below is connected by square symbols. Symbols can also have custom size.</p>


  margin: 1em;


//Change connecting points into symbols

//example below shows connecting points changed to square symbol

let chart = d3_rs_lines.html()
    .symbol('symbolSquare') //symbol set to square
    .symbolSize(100);    //change the size of the symbol
  These are the different symbols it can take:
  symbolCircle, circle symbol
  symbolCross,  cross symbol
  symbolDiamond, diamond symbol
  symbolSquare, square symbol
  symbolStar, star symbol
  symbolTriangle, triangle symbol
  symbolWye   wye symbol