Learning Highcharts 4

The error bar chart

An error bar is another technical chart that shows the standard error, which is the standard deviation divided by the square root of the sample size. It means that as the sample size increases, the variation from the sample mean diminishes. The error bar series has similar color and style options as the box plot but only applies to whisker and stem:

               plotOptions: {
                   errorbar: {
                       stemColor: "#808080",
                       stemDashStyle: 'dashdot',
                       stemWidth: 2,
                       whiskerColor: '#808080',
                       whiskerWidth: 2,
                       whiskerLength: '20%'
                   }
               },

The same also applies to the tooltip formatter, in which low and high refer to both ends of the error bar. As for the series data option, it takes an array of tuples of lower and upper values:

 series: [{ type: 'column', data: ...