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The density plot assigns a grid to the scatterplot and counts the number of points in each cell of that grid, then displays them three-dimensionally with the count as the third dimension. Adding lines to this three-dimensional plot creates a fabric-like mesh across the plot revealing the density of “overstrikes” (points piled on top of one another) and clusters in the data.
The user has control over the underlying scatterplot grid. Use finer grids on larger datasets to separate out the smallest clusters within the data. The plot is also colored so peaks turn red while valleys are green or blue. Combined with the ability to rotate, this graphical display is wonderful for presentations and revealing patterns in the data.
Author: Matthew C. Hutcheson
Download: Density-Plot.dsk
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