ie => xb(serie.result.estimate))
	.attr("fill", "#4ECDC4")
	.on("mouseover", function (serie) {
	    // Specify where to put label of text
	    bargraph.append("text")
		.attr("class", "axisTitle")
		.attr("id", "tt")
		.attr("x", wbar-200)
		.attr("y", marginbar.top-10)
		.text("Value: "+d3.format(".4s")(serie.result.estimate));
	})
        .on("mouseout", function (serie) {
	    // Select text by id and then remove
	    d3.selectAll("#tt").transition().duration("50").remove();
	});

};

// [histrogram (da