How to make vertical annotation when using Google Charts DataTable roles?

Question

I am using the Google Chart Tools DataTable Roles feature to annotate LineChart as mentioned in the below link:- https://developers.google.com/chart/interactive/docs/roles

But the annotations are coming Horizontal and not vertical. For example "Started Using Spreadsheets" annotation below is vertical which is what I want but for me its not coming vertical.

I am using the below code to add annotated column:-

addColumn({type:'string', role:'annotation'});

Please help.

Answer 1

You are close! Since you have regular annotations ready, just add to your chart options: annotations: {style: 'line'}.

jsFiddle example: http://jsfiddle.net/tVCv9/268/

Read the docs on annotations: https://developers.google.com/chart/interactive/docs/roles?hl=fr#annotationrole

Good luck!