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                                  • Since v19.2 the logarithmic scale in the dxChart, dxPolarChart, and dxRangeSelector widgets displays negative values and zeros.

                                    If you want to keep the previous behavior, in which values are skipped, change negative values and zeros to null in your data. For example, you can add a map function to data source configuration as follows:

                                    [JavaScript]
                                    var dataSource = new DevExpress.data.DataSource({ store: data, map: function(itemData) { itemData.val = itemData.val > 0 ? itemData.val : null; return itemData; } });

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