Using R and RStudio for data management, statistical analysis, and graphics / Nicholas J. Horton (Department of Mathematics and Statistics, Amherst College, Massachusetts, U.S.A.), Ken Kleinman (Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, U.S.A.). - Horton, Nicholas J.; Kleinman, Ken (CRC Press, Taylor & Francis Group, 2015)