group

groups data by a certain property. The method get an object with the following properties as a parameter:

by	string	defines the property that need being used to group data objects
map	object	an object that defines the properties of the grouped objects

Example

myChart.group({
    by:"#company#",
    map:{
        sales:["#sales#","sum"]
    }
});

Properties of grouped objects set in "map" are defined by an array. The first element of this array is a template with a property from original data, the second one – the functor which needs being applied to all values of this property in a group: "sum", "max", "min" or Custom Grouping Functor

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