How to add target line in google column chart?

Question

How to add the target line in google column chart like this.

Answer 1

If you'd like to combine the columnchart and linechart, use ComboChart. Documentation and examples are here : https://developers.google.com/chart/interactive/docs/gallery/combochart

basically, have the data point for the line chart as one of the columns in the DataTable and specify this column to be the "series" = "line", whereas the other columns are visualized in a ColumnChart.