
	  .selectAll(".mainTitle")
	  .data(inputs.series)
	  .enter()
	  .append("div")
	    .attr("id", (data, i) => "title-"+i)
   	    .style("grid-row", (data,i) =>""+(4*i+3))
      	    .style("grid-column", "1 / "+(nb_col+1))
  	    .attr("class","mainTitle")
	  .append("text")
  	    .attr("x", wsvg)
  	    .attr("y", margin.top-10)
            .text((data, i) => "#"+data.name);

    // Linear regression graph titles
    const titles_lr = main
	  .selectAll("#title_lr")
	  .data(inputs.series)
	  .enter()