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## Data documentation
#' Data for the batteries example
#'
#' This is a simulated data set of 18 measurements of the voltage of batteries using different
#' voltmeters.
#'
#' @format
#' A data frame with 18 observations on the following 4 variables.
#' \describe{
#' \item{\code{voltmeter}}{a factor with levels \code{1} \code{2}}
#' \item{\code{battery}}{a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{run}}{a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{voltage}}{a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 5 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.batteries
#' @usage data(ss.data.batteries)
#' @docType data
#' @keywords data msa
#' @name ss.data.batteries
#' @seealso \link{ss.rr}
#' @examples
#' data(ss.data.batteries)
#' summary(ss.data.batteries)
#' plot(voltage~voltmeter, data = ss.data.batteries)
#'
NULL
#' Data for the bolts example
#'
#' A data frame with 50 observations of the diameter of the bolts manufactured
#' in a production line.
#'
#' @format
#' A data frame with 50 observations on the following variable.
#' \describe{
#' \item{\code{diameter}}{a numeric vector with the diameter of the bolts}
#' }
#'
#' @note
#' This data set is used in chapter 4 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.bolts
#' @usage data(ss.data.bolts)
#' @docType data
#' @keywords data lfa
#' @name ss.data.bolts
#' @seealso \link{ss.lfa}
#' @examples
#' data(ss.data.bolts)
#' summary(ss.data.bolts)
#' hist(ss.data.bolts$diameter)
#'
NULL
#' Data for a filling process in a winery
#'
#' The only field of the data is the volume measured in 20 bottles.
#'
#' @format
#' A data frame with 20 observations on the following variable.
#' \describe{
#' \item{\code{Volume}}{a numeric vector (volume in cl}
#' }
#'
#' @note
#' This data set is used in chapter 7 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.ca
#' @usage data(ss.data.ca)
#' @docType data
#' @keywords data capability
#' @name ss.data.ca
#' @seealso \link{ss.study.ca}
#' @examples
#' data(ss.data.ca)
#' summary(ss.data.ca)
#' hist(ss.data.ca$Volume)
#'
NULL
#' Pizza dough example data
#'
#' Experimental data for the scores given to a set of pizza doughs.
#'
#' @format
#' A data frame with 16 observations on the following 6 variables.
#' \describe{
#' \item{\code{repl}}{Replication id}
#' \item{\code{flour}}{Level of flour in the recipe (\code{-} \code{+})}
#' \item{\code{salt}}{Level of salt in the recipe (\code{-} \code{+})}
#' \item{\code{bakPow}}{Level of Baking Powder in the recipe (\code{-} \code{+})}
#' \item{\code{score}}{Scored assigned to the recipe}
#' \item{\code{ord}}{Randomized order}
#' }
#'
#' @note
#' This data set is used in chapter 11 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.doe1
#' @usage data(ss.data.doe1)
#' @docType data
#' @keywords data doe
#' @name ss.data.doe1
#' @examples
#' data(ss.data.doe1)
#' summary(ss.data.doe1)
#' lattice::bwplot(score ~ flour | salt + bakPow ,
#' data = ss.data.doe1,
#' xlab = "Flour",
#' strip = function(..., style) lattice::strip.default(..., strip.names=c(TRUE,TRUE)))
#'
NULL
#' Data for the pizza dough example (robust design)
#'
#' Experimental data for the scores given to a set of pizza doughs. Noise factors added
#' for robust design.
#'
#' @format
#' A data frame with 64 observations on the following 7 variables.
#' \describe{
#' \item{\code{repl}}{Replication id}
#' \item{\code{flour}}{Level of flour in the recipe (\code{-} \code{+})}
#' \item{\code{salt}}{Level of salt in the recipe (\code{-} \code{+})}
#' \item{\code{bakPow}}{Level of Baking Powder in the recipe (\code{-} \code{+})}
#' \item{\code{temp}}{Level of temperature in preparation (\code{-} \code{+})}
#' \item{\code{time}}{Level of time in preparation (\code{-} \code{+})}
#' \item{\code{score}}{Scored assigned to the recipe}
#' }
#'
#' @note
#' This data set is used in chapter 11 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.doe2
#' @usage data(ss.data.doe2)
#' @docType data
#' @keywords data doe
#' @name ss.data.doe2
#' @examples
#' data(ss.data.doe2)
#' summary(ss.data.doe2)
#' lattice::bwplot(score ~ temp | time, data = ss.data.doe2)
#'
NULL
#' Pastries data
#'
#' A data frame with 18 observations of the amount of the CTQ compound in some
#' pastries from a bakery. There are two runs for each combination of two factors
#' (laboratory and batch).
#'
#' @format
#' A data frame with 18 observations on the following 4 variables.
#' \describe{
#' \item{\code{lab}}{laboratory: a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{batch}}{batch: a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{run}}{identifies the run: a factor with levels \code{1} \code{2}}
#' \item{\code{comp}}{proportion of the compound in the pastry: a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 5 exercises of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pastries
#' @usage data(ss.data.pastries)
#' @docType data
#' @keywords data msa
#' @name ss.data.pastries
#' @examples
#' data(ss.data.pastries)
#' summary(ss.data.pastries)
#' lattice::xyplot(comp ~ lab | batch, data = ss.data.pastries)
#'
NULL
#' Particle Boards Example - Individual Data
#'
#' Humidity of 30 raw material used to make particle boards for individual control chart.
#'
#' @format
#' A data frame with 30 observations on the following 2 variables.
#' \describe{
#' \item{\code{pb.group}}{Group id (distinct for each observation)}
#' \item{\code{pb.humidity}}{Humidity of the particle board}
#' }
#'
#' @note
#' This data set is used in chapter 12 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pb1
#' @usage data(ss.data.pb1)
#' @docType data
#' @keywords data cc
#' @name ss.data.pb1
#' @examples
#' data(ss.data.pb1)
#' summary(ss.data.pb1)
#'
NULL
#' Particle Boards Example - by Groups
#'
#' Humidity of 20 groups of size 5 of raw materials to make particle boards. For the mean and range control chart.
#'
#' @format
#' A data frame with 100 observations on the following 2 variables.
#' \describe{
#' \item{\code{pb.group}}{a numeric vector}
#' \item{\code{pb.humidity}}{a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 12 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pb2
#' @usage data(ss.data.pb2)
#' @docType data
#' @keywords data cc
#' @name ss.data.pb2
#' @examples
#' data(ss.data.pb2)
#' summary(ss.data.pb2)
#'
NULL
#' Particle Boards Example - Attribute data
#'
#' Counts of raw materials stockouts during 22 weekdays in a month.
#'
#' @format
#' A data frame with 22 observations on the following 3 variables.
#' \describe{
#' \item{\code{day}}{Day id}
#' \item{\code{stockouts}}{Number of stockouts}
#' \item{\code{orders}}{Number of orders}
#' }
#'
#' @note
#' This data set is used in chapter 12 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pb3
#' @usage data(ss.data.pb3)
#' @docType data
#' @keywords data cc
#' @name ss.data.pb3
#' @examples
#' data(ss.data.pb3)
#' summary(ss.data.pb3)
#'
NULL
#' Data for Practicle Boards Example - number of defects
#'
#' Number of defects detected in an order of particle boards.
#'
#' @format
#' A data frame with 80 observations on the following 2 variables.
#' \describe{
#' \item{\code{order}}{Order id}
#' \item{\code{defects}}{Number of defects}
#' }
#'
#' @note
#' This data set is used in chapter 12 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pb4
#' @usage data(ss.data.pb4)
#' @docType data
#' @keywords data cc
#' @name ss.data.pb4
#' @examples
#' data(ss.data.pb4)
#' summary(ss.data.pb4)
#'
NULL
#' Larger data set for the printer cartridges example
#'
#' This data set contains data from a simulated process of printer cartridges filling with
#' complete replications.
#'
#' @format
#' A data frame with 72 observations on the following 5 variables,
#' \describe{
#' \item{\code{filler}}{a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{batch}}{a factor with levels \code{1} \code{2} \code{3} \code{4}}
#' \item{\code{col}}{a factor with levels \code{B} \code{C}}
#' \item{\code{operator}}{a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{volume}}{a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 8 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pc.big
#' @usage data(ss.data.pc.big)
#' @docType data
#' @keywords data charts
#' @name ss.data.pc.big
#' @examples
#' data(ss.data.pc.big)
#' summary(ss.data.pc.big)
#'
NULL
#' Data set for the printer cartridge example, by region
#'
#' This data set contains data from a simulated process of printer cartridge filling.
#' The dataframe contains defects by region of each type of cartridge.
#'
#' @format
#' A data frame with 5 observations on the following 4 variables.
#' \describe{
#' \item{\code{pc.regions}}{a factor with levels \code{region.1} \code{region.2} \code{region.3} \code{region.4} \code{region.5}}
#' \item{\code{pc.def.a}}{a numeric vector for defects type A}
#' \item{\code{pc.def.b}}{a numeric vector for defects type B}
#' \item{\code{pc.def}}{a numeric vector for total defects}
#' }
#'
#' @note
#' This data set is used in chapter 8 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pc.r
#' @usage data(ss.data.pc.r)
#' @docType data
#' @keywords data charts
#' @name ss.data.pc.r
#' @examples
#' data(ss.data.pc.r)
#' summary(ss.data.pc.r)
#'
NULL
#' Data set for the printer cartridge example
#'
#' This data set contains data from a simulated process of printer cartridge filling.
#'
#' @format
#' A data frame with 24 observations on the following 6 variables.
#' \describe{
#' \item{\code{pc.col}}{a factor with levels \code{C} \code{B} for the colour}
#' \item{\code{pc.filler}}{a factor with levels \code{1} \code{2} \code{3}}
#' \item{\code{pc.volume}}{a numeric vector}
#' \item{\code{pc.density}}{a numeric vector}
#' \item{\code{pc.batch}}{a numeric vector}
#' \item{\code{pc.op}}{a factor with levels \code{A} \code{B} \code{C} \code{D}
#' for the operator}
#' }
#'
#' @note
#' This data set is used in chapter 8 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.pc
#' @usage data(ss.data.pc)
#' @docType data
#' @keywords data charts
#' @name ss.data.pc
#' @examples
#' data(ss.data.pc)
#' summary(ss.data.pc)
#'
NULL
#' Gage R&R data
#'
#' Example data for Measure phase of the Six Sigma methodology.
#'
#' @format
#' A data frame with 27 observations on the following 5 variables.
#' \describe{
#' \item{\code{prototype}}{a factor with levels \code{prot #1}
#' \code{prot #2} \code{prot #3}}
#' \item{\code{operator}}{a factor with levels \code{op #1} \code{op
#' #2} \code{op #3}}
#' \item{\code{run}}{a factor with levels \code{run #1} \code{run #2} \code{run #3}}
#' \item{\code{time1}}{a numeric vector}
#' \item{\code{time2}}{a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 5 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.rr
#' @usage data(ss.data.rr)
#' @docType data
#' @keywords data msa
#' @name ss.data.rr
#' @examples
#' data(ss.data.rr)
#' summary(ss.data.rr)
#'
NULL
#' Data set for the Guitar Strings example
#'
#' This data set contains data from a simulated process of guitar strings production.
#'
#' @format
#' A data frame with 120 observations on the following 6 variables.
#' \describe{
#' \item{\code{id}}{a numeric vector}
#' \item{\code{type}}{a factor with levels \code{A5} \code{B2} \code{D4} \code{E1} \code{E6} \code{G3}}
#' \item{\code{res}}{a numeric vector for resistance}
#' \item{\code{len}}{a numeric vector for length}
#' \item{\code{sound}}{a numeric vector for}
#' \item{\code{power}}{a numeric vector}
#' }
#'
#' @note
#' This data set is used in chapter 10 of the book ``Six Sigma with R'' (see
#' References).
#'
#' @references
#' Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
#' \emph{Six Sigma with {R}. Statistical Engineering for Process
#' Improvement}, Use R!, vol. 36. Springer, New York.
#' \url{https://link.springer.com/book/10.1007/978-1-4614-3652-2}.\cr
#'
#' @source See references.
#' @aliases ss.data.strings
#' @usage data(ss.data.strings)
#' @docType data
#' @keywords data msa
#' @name ss.data.strings
#' @examples
#' data(ss.data.strings)
#' summary(ss.data.strings)
#'
NULL
#' Errors in bills data set
#'
#' This data set contains the number of errors detected in a set of bills and
#' the name of the person in charge of the bill.
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#'
#' @name ss.data.bills
#' @docType data
#' @usage data("ss.data.bills")
#' @format A data frame with 32 observations on the following 3 variables.
#' \describe{ \item{nbill}{a numeric vector identifying a given bill}
#' \item{clerk}{a character vector for the clerk responsible for the
#' bill} \item{errors}{a character vector with the number of errors in
#' the bill} }
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#' @source Table 6.1 in the reference below.
#' @keywords datasets
#' @examples
#'
#' data(ss.data.bills)
#' str(ss.data.bills)
#' barplot(table(ss.data.bills$clerk),
#' main = "number of invoices")
#' aggregate(errors ~ clerk, ss.data.bills, sum)
#'
NULL
#' Pellets density
#'
#' This data set contains the density for 24 pellets.
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#' Note that, in the book, the vector named \code{pdensity} is directly created
#' and then used in the examples.
#'
#' @name ss.data.density
#' @docType data
#' @usage data("ss.data.density")
#' @format A vector with 24 items for the density of a set of pellets
#' (\emph{gr/cm}$^3$).
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#' @source Table 1.2 in the reference below.
#' @keywords datasets
#' @examples
#'
#' data(ss.data.density)
#' str(ss.data.density)
#' summary(ss.data.density)
#'
NULL
#' Metal Plates Thickness
#'
#' This data set contains the thickness and additional data for 24 metal
#' plates.
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#' Note that, in the book, the data set is named \code{plates} and it is
#' created sequentially throughout the examples.
#'
#' @name ss.data.thickness
#' @docType data
#' @usage data("ss.data.thickness")
#' @format A data frame with 24 observations on the following 5 variables.
#' \describe{ \item{thickness}{a numeric vector with the thickness
#' (\emph{in})} \item{day}{a factor with the day (two days)}
#' \item{shift}{a factor with the shift (two shifts)}
#' \item{dayshift}{a factor with the day-shift combination}
#' \item{position}{a factor with the position of the thickness with
#' respect to the nominal value of 0.75 \emph{in}} }
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#' @source Table 5.1 in the reference below.
#' @keywords datasets
#' @examples
#'
#' data(ss.data.thickness)
#' str(ss.data.thickness)
#' lattice::bwplot(thickness ~ shift | day,
#' data = ss.data.thickness)
#'
NULL
#' Metal Plates thickness (extended)
#'
#' This data set contains the thickness and additional data for 84 metal
#' plates.
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#'
#' @name ss.data.thickness2
#' @docType data
#' @usage data("ss.data.thickness2")
#' @format A data frame with 84 observations on the following 5 variables.
#' \describe{ \item{day}{a factor with the day (seven days)}
#' \item{shift}{a factor with the shift (two shifts)}
#' \item{thickness}{a numeric vector with the thickness (\emph{in})}
#' \item{ushift}{a factor with the day-shift combination}
#' \item{flaws}{an integer vector with the number of flaws on the
#' surface of sampled plates} }
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#' @source Examples 8.1 and 9.9 in the reference below.
#' @keywords datasets
#' @examples
#'
#' data(ss.data.thickness2)
#' str(ss.data.thickness2)
#' lattice::dotplot(thickness ~ shift | day,
#' data = ss.data.thickness2,
#' layout = c(7, 1))
#'
NULL
#' Woodboard location for profiles
#'
#' This data set contains the 500 locations at which the density of a
#' 0.5\emph{in}-thick engineered woodboard is measured, i.e., 0.001 \emph{in}
#' apart
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#' This data set should be used along with the \code{\link{ss.data.wby}} data
#' set.
#'
#' @name ss.data.wbx
#' @docType data
#' @usage data("ss.data.wbx")
#' @format A vector with 500 items for the locations (\emph{in}).
#' @seealso \code{\link{ss.data.wby}}
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#'
#' Walker, E. amd Wright, W (2002) Comparing curves with additive models.
#' \emph{J. Qual. Technol.} \bold{34}(1), 118--129
#' @source Example 10.1 in the reference below. It is a variation of the one
#' introduced by Walker (2002).
#' @keywords datasets
#' @examples
#'
#' data(ss.data.wbx)
#' data(ss.data.wby)
#' plotProfiles(profiles = ss.data.wby,
#' x = ss.data.wbx)
#'
NULL
#' Woodboard profiles
#'
#' This data set contains 50 profiles corresponding to the density measurements
#' of 50 0.5\emph{in}-thick engineered woodboard, measured in 500 locations.
#'
#' This data set illustrates concepts in the book ``Quality Control with R''.
#' This data set should be used along with the \code{\link{ss.data.wbx}} data
#' set.
#'
#' @name ss.data.wby
#' @docType data
#' @usage data("ss.data.wby")
#' @format A matrix with 500 rows (locations) and 50 columns (woodboard).
#' @seealso \code{\link{ss.data.wbx}}
#' @references Cano, E.L. and Moguerza, J.M. and Prieto Corcoba, M. (2015)
#' \emph{Quality Control with R. An ISO Standards Approach}. Springer.
#'
#' Walker, E. amd Wright, W (2002) Comparing curves with additive models.
#' \emph{J. Qual. Technol.} \bold{34}(1), 118--129
#' @source Example 10.1 in the reference below. It is a variation of the one
#' introduced by Walker (2002).
#' @keywords datasets
#' @examples
#'
#' data(ss.data.wbx)
#' data(ss.data.wby)
#' plotProfiles(profiles = ss.data.wby,
#' x = ss.data.wbx)
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