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# Example: Create a Stacked Area Chart with Planar Based Events

This example shows how to create a `Chart` with planar based events.

### This example shows how to create a Stacked Area Chart that fires planar events.

By default, Charts fires mouse events based on marker interaction. This is not always preferable. You may have a chart without markers or you may want to display data about all markers intersecting a plane. The `interactionType` attribute allows you to do this. In this example, setting stacked area chart's `interactionType` attribute to "planar" allows the tooltip to display all relevant data on a vertical plane.

#### CSS

    #mychart {
        margin:10px 10px 10px 10px;
        width:90%;
        max-width: 800px;
        height:400px;
    }

#### HTML

    <div id="mychart"></div>

#### JavaScript

    var myDataValues = [
        {date:"1/1/2010", miscellaneous:2000, expenses:3700, revenue:2200},
        {date:"2/1/2010", miscellaneous:3000, expenses:3100, revenue:4100},
        {date:"3/1/2010", miscellaneous:400, expenses:1100, revenue:1500},
        {date:"4/1/2010", miscellaneous:200, expenses:1900, revenue:2800},
        {date:"5/1/2010", miscellaneous:500, expenses:7000, revenue:2650},
        {date:"6/1/2010", miscellaneous:3000, expenses:4700, revenue:1200},
        {date:"7/1/2010", miscellaneous:6550, expenses:6500, revenue:1100},
        {date:"8/1/2010", miscellaneous:4005, expenses:2600, revenue:3500},
        {date:"9/1/2010", miscellaneous:1200, expenses:8900, revenue:3800},
        {date:"10/1/2010", miscellaneous:2000, expenses:1000, revenue:3650},
        {date:"11/1/2010", miscellaneous:2000, expenses:3700, revenue:2200},
        {date:"12/1/2010", miscellaneous:5000, expenses:3100, revenue:4100}
    ];

    var mychart = new Y.Chart({
                            dataProvider:myDataValues,
                            render:"#mychart",
                            type:"area",
                            stacked:true,
                            categoryType:"time",
                            categoryKey:"date",
                            interactionType:"planar"
                        });