The last time I requested a feature, it was ignored for 6 months straight before it was discontinued, even though it was the most popular request in the queue. As it is, we still don't have the ability to use dotted lines rather than solid lines (as I would be using that rather than stacked area, per my users). I don't see this being any different.

Your example shows that I need to process for a random number of values to add together for each series to simulate a stacked line series. It doesn't give a way to dynamically allocate the series in the HTML code, though, so I would need a working example of that to move forward.

It also seems to demonstrate that you cannot also accomplish this functionality with area series. Is this a correct assumption?

Your demonstration covers 3 lines, which could potentially be adequate with a more dynamic feel to it. I typically have to deal with 7-40 lines/areas per chart, often stacked together.

My other use case, which I've just remembered, is a category chart with lines that also has nulls, rather than 0/lowest scale. I'm seeing that the other implementation (UnknownValuePlotting="'DontPlot'") doesn't work in this case. I would assume there's another way to accomplish it. I will check the documentation to see if this is so. Meanwhile, its implementation currently stands at the below:

<div style="float: left; width: 50%">
	<div class="inline">
		<label>{{ param }}:&nbsp;</label>
		<igx-legend #paramLeg orientation="horizontal" title="{{ param }}"></igx-legend>
	</div>
	<igx-category-chart
		height="{{ chartHeight }}px"
		width="{{ width ? width : '100%' }}"
		[dataSource]="paramData"
		[legend]="paramLeg"
		chartType="line"
		yAxisTitle="{{ param }}"
		brushes="{{ brushes }}"
		markerTypes="none"
		toolTipType="category"></igx-category-chart>
</div>

It dynamically has 1-3 series, but is replicated the amount of times as the previous use case, in tabular form.

I appreciate the response.

I have verified that I do not have any data represented as 0/lowest scaled value. I also don't think the UnknownValuePlotting is the issue, either. I have added it to the chart details to no avail. Here is my code, please let me know what I'm doing wrong:

<igx-data-chart
	#chart
	height="{{ chartHeight }}px"
	width="{{ width ? width : '100%' }}"
	[dataSource]="outData1"
	brushes="{{ brushes }}"
	outlines="{{ outlines }}"
	(refreshCompleted)="onRefreshCompleted()"
	toolTipType="category">
	<igx-category-x-axis #xAxis label="Date" title="Time Periods ({{ rollup }})"></igx-category-x-axis>
	<igx-numeric-y-axis #yAxis title="Quantity Produced ({{ param }})" abbreviateLargeNumbers="true"></igx-numeric-y-axis>
	<igx-stacked-area-series [xAxis]="xAxis" [yAxis]="yAxis" [dataSource]="outData1" [legend]="legend1" UnknownValuePlotting="'DontPlot'"></igx-stacked-area-series>
	<igx-stacked-line-series [xAxis]="xAxis" [yAxis]="yAxis" [dataSource]="outData2" [legend]="legend2" UnknownValuePlotting="'DontPlot'"></igx-stacked-line-series>
</igx-data-chart>