series.stack Boolean|String|Object (default: false)

A Boolean value indicating if the series should be stacked. A string value is interpreted as series.stack.group.

The stack options is supported when series.type is set to "bar", "column", "line", "area", "verticalLine", "verticalArea", "radarLine", "radarArea" and "radarColumn".

Stack settings of the first series are applied to the rest of the series.

Example - configure stack series

<span id="sparkline"></span>
<script>
$("#sparkline").kendoSparkline({
  series: [
    { stack: true, data: [ 1, 2 , 3] },
    { data: [ 4, 5 , 6] }
  ]
});
</script>
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