Surface Plot
Surface Plots are used to identify trends and outliers within numeric surfaces.
The Surface is made up of a series of points where each point has:
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X Position
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Y Position
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Color (represents the Z-axis)
The Surface Plot can support data sets where the X and Y positions can both be regular and irregular in their distribution.
Additionally, the color scale can be continuous or stepped to show a surface gradient.
Figure 1. A surface plot with stepped colors
Figure 2. A surface plot with continuous colors