期刊
JOURNAL OF STATISTICAL SOFTWARE
卷 50, 期 12, 页码 1-23出版社
JOURNAL STATISTICAL SOFTWARE
DOI: 10.18637/jss.v050.i12
关键词
nonparametric; longitudinal data; factorial design; nparLD; R
资金
- National Science and Engineering Research Council (NSERC) of Canada
- German Academic Exchange Service (DAAD)
- German Research Foundation grant [DFG-BR655/16-1]
Longitudinal data from factorial experiments frequently arise in various fields of study, ranging from medicine and biology to public policy and sociology. In most practical situations, the distribution of observed data is unknown and there may exist a number of atypical measurements and outliers. Hence, use of parametric and semiparametric procedures that impose restrictive distributional assumptions on observed longitudinal samples becomes questionable. This, in turn, has led to a substantial demand for statistical procedures that enable us to accurately and reliably analyze longitudinal measurements in factorial experiments with minimal conditions on available data, and robust nonparametric methodology offering such a possibility becomes of particular practical importance. In this article, we introduce a new R package nparLD which provides statisticians and researchers from other disciplines an easy and user-friendly access to the most up-to-date robust rank-based methods for the analysis of longitudinal data in factorial settings. We illustrate the implemented procedures by case studies from dentistry, biology, and medicine.
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