How can I combine all the areas in an ExtJS Area Chart with varying opacity levels instead of stacking them on top of each other?

I'm currently working on an area chart in ExtJS 4.1 and so far, everything is being displayed correctly.

My issue is that one area is overlapping another in the chart, which I would like to avoid. Is there a way to overlay all the areas instead? Perhaps adjusting the opacity so that they are all visible at once?

Most of the examples I have found only show stacked behavior for area charts. Is this the default setting or is there a simple configuration option that I am overlooking?

In the Area Charts Example, the colored areas appear sequentially one after the other. My goal is to have them all on the same plane simultaneously.

Please share any suggestions or insights you may have on this matter.

javascriptextjschartsvisualization

Answer №1

Try using a Line chart with the fill option instead - it has been effective for me in similar situations.

Answer №2

To achieve this, you can create multiple series instead of a single area series with an array of data points on the y-axis. This solution was discovered while browsing through discussions on Sencha forums.

series: [
  {
    type: 'area',
    highlight: false,
    axis: 'left',
    xField: 'name',
    yField: ['data1'],
    style: {
        opacity: 0.50
    }
},
  {
    type: 'area',
    highlight: false,
    axis: 'left',
    xField: 'name',
    yField: ['data2'],
    style: {
        opacity: 0.70
    }
}

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