Thanks Tim,

I have a question:

In your example, data is present in controller itself, how can I store the 
data effectively in database and then use that data for plotting graphs?

Can you please provide an example of how this can be stored/retrieved from 
db? I searched the net and found people suggesting pickle/json for 
storing/retrieving from db, but I'm not having any experience with both. 
Can you please help.

def plugin_return_data():
    data = 
[['Year','Sales','Expenses'],["2004",1000,400],["2005",1100,440],["2006",1200,600],
            ["2007",1500,800],["2008",1600,850],["2009",1800,900]]
    return dict(data=data)

-Sarbjit

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