ggplot2 : elegant graphics for data analysis - 2nd ed. - USA: Springer, 2016. - xvi,250p.: col. ill.;pbk. 24 cm. Includes bibliographical references and index. ISBN: 9783319242750 Subjects--Topical Terms: MathematicsStatisticsVisualizationComputer graphics Dewey Class. No.: 001.4226 WIC