			    .attr("y", innerH/2)
			    .text("Density");

			const bandwidth = vslider;
			const update_kde = plot_kde(pdfgraph, data, bandwidth, xscale, yscale, x);

			//slider
			control_container.insert("p")
			    .attr("align", "center")
			    .attr("id", "slidertitle-"+i)
			    .text("Bandwidth");

			control_container.insert("svg")
			    .attr("width", wsvg)
			    .attr("height", hslider)
			    .attr("id", "slider-"+i)
			    .append("g")
			    .attr("transform", "translate("+(wsvg-wslider)/2+",10