It is always hard to diagnose unspecified "problems", but it should not matter. You do need to use statistical methods specifically designed for circular data. Even simple descriptive statistics such as the mean, standard deviation, and variance require special functions. Try package circular. ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Jeff Reichman Sent: Tuesday, March 15, 2016 6:14 PM To: r-help at r-project.org Subject: [R] Circular Statistic in R R-Help Is it preferable to work in Radians or Degrees when performing circular statistics. I'm assuming radians because I'm running into problems in Degrees. Jeff [[alternative HTML version deleted]] ______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.