Logarithmic Spiral

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The logarithmic spiral is plotted with the origin in red. It can be expressed in polar coordinates as or parametrically as:

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,

.

Each small black point represents the spiral's point for a different angle . Specifically, 80 black points are plotted for each completed round (). The big black point represents the "initial point" corresponding to . The big blue point highlights the point for the specific angle selected with the control.

Select "fixed axes" to restrict the range of in the plot to . Without "fixed axes", the same spiral can be seen resized; the unit line segment along the axis shows the scale.

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Contributed by: Loreto Llorente (March 2011)
Open content licensed under CC BY-NC-SA


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