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A vector plot allows you to chart four variables in two dimensions by varying the lengths and angles of vectors drawn from each data point in a scatter plot based on a third and fourth variable. In DPlot, the third and fourth dimensions (angle and manitude) are taken from the Y values of two other curves. The source curves for the vector angles and magnitudes will not be drawn. DPlot ignores the X values for the source curve(s); e.g. the n’th point of the angle source curve is used as the angle for n’th point of the selected curve, regardless of whether the X values match up. This command is disabled if fewer than 3 curves are present in the plot.
The low and high vector lengths and colors are mapped to the low and high absolute value of the amplitudes from the magnitude source curve, respectively. If you want all vectors to be the same size, enter identical values for the low and high sizes. Likewise if you want all vectors to be the same color, select identical colors.
Line segments are not drawn between data points for vector plots, though you can mix curves using vectors with curves that do not use this feature.
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Related macro commands |
Page url: http://www.dplot.com/help/index.htm?helpid_vectors.htm
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