Google可视化目标行

Question

I'm trying to add a target line in Google visualisation graph. Only when there is only one result, the target line is a dot instead of an expected line.

chart.draw(data, 
{
    hAxis: {title: '', titleTextStyle: {color: 'red'}},
    seriesType: 'bars', 
    series: {1: {type: 'line'}}
});

Answer 1

Use:

Combo Chart

Use data point for the line chart as one of the columns in the DataTable and specify in options this column to be the "series"-"type"-"line" and other columns are visualized in a ColumnChart.

OR

Stepped Area Chart