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Home/ Questions/Q 6854463
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T01:38:11+00:00 2026-05-27T01:38:11+00:00

Using ExtJS4, I need to draw a straight line across a column chart indicating

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Using ExtJS4, I need to draw a straight line across a column chart indicating the average of the series. Does anyone have know of an example of this or have a suggestion on how to do it?

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  1. Editorial Team
    Editorial Team
    2026-05-27T01:38:11+00:00Added an answer on May 27, 2026 at 1:38 am

    I usually have the average value calculated on server side and held in the store. For exmaple, My store will be:

    Ext.data.Store({
        fields: ['name','active','avg'],
        autoLoad: true,
        proxy: {
        type: 'ajax',
        url : '/location/to/data'
        }
    }) 
    

    The ‘avg’ holds the average value. The average line is drawn using the following series configuration:

    {
        type: 'line',
        xField: 'name',
        yField: 'avg',
        showMarkers: false    // Ensures that markers don't show up on the line...              
    }
    
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