Google Chart - Show Data Annotations on Points - Interactive Line Chart

I need to show data points on the line chart, i.e. whi开发者_C百科ch appear on mouse over at a point, i need them all displayed by default i.e. not by mouse over. Any clues?

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You can use

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

and add one more value at the time of adding record with data.addRows of type string.

That will be shown just above the point on chart.

Thanks!