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The help() command prints documentation for the requested topic. The sleep dataset is a built-in dataset in R. It comes from William Sealey Gosset’s article under the pseudonym Student (1908). It contains the effects of two drugs, measured as the extra hours of sleep as compared to controls. The vectors x1 and x2 are assigned the values of the extra hours of sleep in drugs 1 and 2, respectively. (a less than sign followed by a minus sign, | UseR Yuelin Li Jonathan Baron Behavioral Research Data Analysis with R UseR Series Editors Robert Gentleman Kurt Hornik Giovanni Parmigiani For further volumes http www.springer.com series 6991 UseR Albert Bayesian Computation with R Bivand Pebesma Gomez-Rubio Applied Spatial Data Analysis with R Cook Swayne Interactive and Dynamic Graphics for Data Analysis With R and GGobi Hahne Huber Gentleman Falcon Bioconductor Case Studies Paradis Analysis of Phylogenetics and Evolution with R Pfaff Analysis of Integrated and Cointegrated Time Series with R Sarkar Lattice Multivariate Data Visualization with R Spector Data Manipulation with
