I have a chart with two series drawn, you can see from the attached image that the series at the top runs from the start to the finish. However the series at the bottom does not as there is no data. Is it possible for the bottom line to be extended so that it does start from the beginning (Is this interpolation?)
There is a way to interpolate, you’d have to insert a single data-point at the start location and the Series will draw a straight line to that point from the next available data-point.
if you wanted a polynomial interpolation that would be something you’d have to calculate yourself and would require more data-points.
Does that help?
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