Google Chart: add vertical line on every monday

Question

I need to add one vertical line on google chart marking monday. as shown in picture.

all of other things has been done.. but couldn't figure out how to put vertical line marking every monday. I found this

hAxis: {
            ticks: ""
        },

functionality in google chart use i can make user of.. but couldn't figure out how do i use it for every monday....

Answer 1

Use This in data:

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

And this in options:

annotations: {
        style: 'line'
    }

See: http://jsfiddle.net/NC37X/