Stacked column charts are a future feature of the igDataChart. If you submit a feature request it will help to make sure that the feature is prioritized correctly.
In the interim, you can emulate a stack column chart by summing the data yourself and using the overlap property of the x axis as in this example:

<script>
        $(function () {
            var data = [{
                category: 'shoes',
                bob: 5,
                david: 6,
                jen: 10
            }, {
                category: 'hats',
                bob: 15,
                david: 8,
                jen: 11
            }, {
                category: 'coats',
                bob: 7,
                david: 6,
                jen: 9
            }, {
                category: 'slippers',
                bob: 7,
                david: 2,
                jen: 12
            }], stackData;

            stackData = function (data, order) {
                var i, j, accum;

                for (i = 0; i < data.length; i++) {
                    accum = 0;
                    for (j = 0; j < order.length; j++) {
                        accum += data[i][order[j]];

                        if (j > 0) {
                            data[i][order[j] + "_sum"] = accum;
                        }
                    }
                }
            }

            console.log(data[0]);
            stackData(data, ["bob", "david", "jen"]);

            $("#container").igDataChart({
                width: "500px",
                height: "500px",
                dataSource: data,
                axes: [{
                    name: "xAxis",
                    type: "categoryX",
                    label: "category",
                    overlap: 1
                },
                {
                    name: "yAxis",
                    type: "numericY",
                    minimumValue: 0
                }],
                series: [{
                    name: "jen",
                    title: "jen",
                    type: "column",
                    xAxis: "xAxis",
                    yAxis: "yAxis",
                    valueMemberPath: "jen_sum"
                }, {
                    name: "david",
                    title: "david",
                    type: "column",
                    xAxis: "xAxis",
                    yAxis: "yAxis",
                    valueMemberPath: "david_sum"
                }, {
                    name: "bob",
                    title: "bob",
                    type: "column",
                    xAxis: "xAxis",
                    yAxis: "yAxis",
                    valueMemberPath: "bob"
                }],
                horizontalZoomable: true,
                verticalZoomable: true,
                windowResponse: "immediate",
                overviewPlusDetailPaneVisibility: "visible",
                legend: { element: "legend" }
            });



        });
    </script>

which produces the following output:

http://ko.infragistics.com/products/jquery/sample/chart/stacked-series