\name{cchart.Xbar_R} \alias{cchart.Xbar_R} %- Also NEED an '\alias' for EACH other topic documented here. \title{ X-bar and R control charts } \description{ This function builds the X-bar and R control charts in the same window. } \usage{ cchart.Xbar_R(x, sizes) } %- maybe also 'usage' for other objects documented here. \arguments{ \item{x}{ The data to be plotted. } \item{sizes}{ A value or a vector of values specifying the sample sizes associated with each group. } } \value{ Return the two control charts. } \author{ Daniela R. Recchia, Emanuel P. Barbosa. } \examples{ data(pistonrings) attach(pistonrings) cchart.Xbar_R(pistonrings[1:25, ]) }