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Oriana 4




Oriana is a powerful software tool used for circular statistics and circular data analysis, particularly in the fields of biology, ecology, and environmental science. Oriana 4 is the latest version of this software, offering a range of advanced features and tools for analyzing and visualizing circular data.

Key Features:

  • Circular Statistics: Oriana 4 provides a comprehensive range of circular statistical analysis tools, including mean direction, circular variance, and circular correlation.
  • Data Visualization: The software offers advanced data visualization tools, including circular plots, rose diagrams, and enthusiast plots, to help users understand and communicate complex circular data.
  • Bootstrap Resampling: Oriana 4 includes bootstrap resampling techniques to estimate sampling distributions and confidence intervals for circular statistics.
  • Hotelling’s Test: The software provides a implementation of Hotelling’s test for circular data, which is a useful tool for comparing the mean directions of two or more groups.
  • Kuiper’s Test: Oriana 4 also includes Kuiper’s test, which is a circular analog of the Kolmogorov-Smirnov test, useful for comparing the distribution of two circular datasets.


  • Advanced Circular Statistics: Oriana 4 provides a range of advanced circular statistical analysis tools, enabling users to extract insights from their circular data.
  • Visualize Complex Data: The software’s advanced data visualization tools help users to understand and communicate complex circular data effectively.
  • Robust Analysis: Oriana 4’s bootstrap resampling techniques and Hotelling’s test enable users to perform robust analysis of circular data.
  • Ecological and Environmental Applications: The software is particularly useful in ecological and environmental research, where circular data is often encountered
  • User-Friendly Interface: Oriana 4 has a user-friendly interface, making it easy to use, even for users without extensive experience in circular statistics
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