CircSiZer: an exploratory tool for circular data

@article{Oliveira2013CircSiZerAE,
  title={CircSiZer: an exploratory tool for circular data},
  author={Mar{\'i}a Oliveira and Rosa M. Crujeiras and Alberto Rodr{\'i}guez-Casal},
  journal={Environmental and Ecological Statistics},
  year={2013},
  volume={21},
  pages={143-159}
}
Smoothing methods and SiZer (SIgnificant ZERo crossing of the derivatives) are useful tools for exploring significant underlying structures in data samples. An extension of SiZer to circular data, namely CircSiZer, is introduced. Based on scale-space ideas, CircSiZer presents a graphical device to assess which observed features are statistically significant, both for density and regression analysis with circular data. The method is intended for analyzing the behavior of wind direction in the… 
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