rsm/man/heli.Rd at master · DominikVogel/rsm

Repository navigation

\name{heli}

\alias{heli}

%%%\docType{data}

\title{Paper Helicopter Data}

\description{

A central composite design with 4 factors in 2 blocks. These data

comprise a \code{\link{coded.data}} object.

}

\usage{heli}

\format{

A data frame with 30 observations on the following 7 variables.

Each observation reflects the results of 10 replicated flights under the

same experimental conditions.

\describe{

\item{\code{block}}{a factor with levels \code{1} \code{2}.

Block 1 consists of 18 observations (a full factorial plus two center points).

Block 2 consists of 12 observations -- 8 axis points and 4 center points.}

\item{\code{x1}}{a numeric vector. Coded wing area, \code{x1 ~ (A - 12.4)/.6}}

\item{\code{x2}}{a numeric vector. Coded length ratio, \code{x2 ~ (R - 2.52)/.26}}

\item{\code{x3}}{a numeric vector. Coded body width, \code{x3 ~ (W - 1.25)/.25}}

\item{\code{x4}}{a numeric vector. Coded body length, \code{x4 ~ (L - 2)/.5}}

\item{\code{ave}}{a numeric vector. Average flight time, in csec.}

\item{\code{logSD}}{a numeric vector. 100*log(SD of times).}

}

\source{

Table 12.5 of Box, GEP, Hunter, JS, and Hunter, WG (2005)

\emph{Statistics for Experimenters} (2nd ed.), Wiley.

}

\keyword{datasets}