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A line chart is a diagram representing a certain change between arbitrary units. Generally, it consists of two interval scaled axis. The important concept behind this diagram is to show a certain change in respect to units and in respect to (maybe) other datasets. It is not intended to show absolute measurements.
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##### Axisscalings
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Due to the fact that a line diagram represents change, it should concentrate to show it without deliberate bias. Therefore, the minimum tickmark on each axis should be set according to the minima of the dataset (or on the global minima of all datasets that are to be represented). It is not useful to set the coordinate origin to (0|0), neither as to any other point other than the global minima. Another trivial concept which has to be followed is the fact that the maxima of the datasets should also be represented on the diagram.
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The *LineChartRasterizer* currently uses the min and the max of the datasets to set the ticks accordingly. |
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