Set background for each quadrant in AnyChart polar charts

Question

I am creating a polar chart using AnyChart

anychart.onDocumentReady(function () {
    // create polar chart
    var chart = anychart.polar();

    var columnSeries = chart.column([
        {x: 'A', value: 28.7},
        {x: 'B', value: 19},
        {x: 'C', value: 17.7},       
        {x: 'D', value: 34.7}
    ]);

    // set series name
    columnSeries.name('Percentage');

    // set title settings
    chart.title()
            .enabled(true)
            .text('Test')
            .padding({bottom: 20});

    // disable y-axis
    chart.yAxis(false);

    // set value prefix for tooltip
    chart.tooltip().valuePrefix('%');

    chart.sortPointsByX(true);

    // set x-scale
    chart.xScale('ordinal');

    // set chart container id
    chart.container('container');

    // initiate chart drawing
    chart.draw();
});

html, body, #container {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

<script src="https://cdn.anychart.com/releases/8.2.1/js/anychart-bundle.min.js"></script>
<div id="container"></div>

Is it possible to add a background for each quadrant?

Answer 1

You can do that by assigning a palette of the xGrid:

chart.xGrid().palette(["red 0.5", "green 0.5", "blue 0.5", "cyan 0.5"]);

See a snippet:

anychart.onDocumentReady(function () {
    // create polar chart
    var chart = anychart.polar();

    var columnSeries = chart.column([
        {x: 'A', value: 28.7},
        {x: 'B', value: 19},
        {x: 'C', value: 17.7},       
        {x: 'D', value: 34.7}
    ]);

    // set series name
    columnSeries.name('Percentage');

    // set title settings
    chart.title()
            .enabled(true)
            .text('Test')
            .padding({bottom: 20});

    // disable y-axis
    chart.yAxis(false);

    // set value prefix for tooltip
    chart.tooltip().valuePrefix('%');

    chart.sortPointsByX(true);

    chart.xGrid().palette(["red 0.5", "green 0.5", "blue 0.5", "cyan 0.5"]);

    // set x-scale
    chart.xScale('ordinal');

    // set chart container id
    chart.container('container');

    // initiate chart drawing
    chart.draw();
});

html, body, #container {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

<script src="https://cdn.anychart.com/releases/8.2.1/js/anychart-bundle.min.js"></script>
<div id="container"></div>