Abstract

OSPINA, RAYDONAL; LARANGEIRAS, ANTONIO MARCOS  and  FRERY, ALEJANDRO C.. Visualization of Skewed Data: A Tool in R. Rev.Colomb.Estad. [online]. 2014, vol.37, n.2, pp.399-417. ISSN 0120-1751.  https://doi.org/10.15446/rce.v37n2spe.47945.

After discussing the main characteristics of the histogram and of a number of variations in the boxplot, this work presents a visualization tool specifically tailored to deal with skewed data. The idea is to use various types of boxplots (the classical one, which is tuned for skewness of the data, the shifting boxplot, and the box-percentile plot), the violin plot, and the histogram with a nonparametric estimate of the density overlay. The plots are presented in such a way that they facilitate the extraction of additional information from each one. We show that a good deal of information can be extracted from the inspection of the output using example data from synthetic aperture radar images. We provide an implementation in R based on functions already available.

Keywords : Exploratory Data Analysis; Skewed Data; Boxplot; Violin Plot; Visualization.

        · abstract in Spanish     · text in English     · English ( pdf )