Showing papers by "Douglas M. Bates published in 1997"
01 Jan 1997
TL;DR: This work reexamines the basic design of the mixed-effects modelling functions of lme and nlme and implements a groupedData class with associated constructors, modeling, and display methods, which provides powerful visualization capabilities almost automatically and dramatically simplifies the interface to the modelling code.
Abstract: Software for exploring and modelling longitudinal data can be made much easier to use by incorporating an object-oriented design Current versions of S-Plus provide some object-oriented capability but experimental versions of S emphasize an even stronger commitment to object orientation These new capabilities, combined with the development of Trellis graphics by Cleveland and Becker, caused us to reexamine the basic design of our mixed-effects modelling functions — lme and nlme We chose to implement a groupedData class with associated constructors, modeling, and display methods This provides powerful visualization capabilities almost automatically In addition it dramatically simplifies the interface to the modelling code
4 citations