To the vector belong the spoils: circular statistics in Stata
Circular statistics are needed when one or more variables have outcome space the circle, which is for example true for data measured with reference to compass, clock or calendar. Applications abound in the Earth and environmental sciences, not to mention economic and medical fields well represented among Stata users and other disciplines such as music. Previous talks on circular statistics were given to the London users' meeting in 1997 and 2004. This update will survey the field with special reference to recently revised or newly written programs for graphics, summary, testing and modelling.
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