Compare two data points inside the tooltip in a Highcharts combination chart

问题

I have a combination bar-line chart sharing a single Y axis.

The data points for both the bar and the line chart always share the same Y values. I'd like to be able to calculate the difference between the two X values in the tooltip.

Here's the chart I'm working with:

Combo Chart

回答1:

Got it to work. The trick was in the shared and formatter properties of tooltip:

       tooltip: {

            shared: true,

            formatter: function() {


                var s= this.points[1].y - this.points[0].y;



                return s;

            }

        },

来源：https://stackoverflow.com/questions/10747277/compare-two-data-points-inside-the-tooltip-in-a-highcharts-combination-chart