R/Exam8.3.R

In StroupGLMM: R Codes and Datasets for Generalized Linear Mixed Models: Modern Concepts, Methods and Applications by Walter W. Stroup

#' @title Example 8.3 from Generalized Linear Mixed Models: Modern Concepts, Methods and Applications by Walter W. Stroup (p-255)
#' @name   Exam8.3
#' @description Exam8.3 explains Response surface design with incomplete blocking
#' @author \enumerate{
#'          \item  Muhammad Yaseen (\email{myaseen208@@gmail.com})
#'          \item Adeela Munawar (\email{adeela.uaf@@gmail.com})
#'          }
#' @references \enumerate{
#' \item Stroup, W. W. (2012).
#'      \emph{Generalized Linear Mixed Models: Modern Concepts, Methods and Applications}.
#'        CRC Press.
#'  }
#'
#' @seealso
#'    \code{\link{DataSet8.3}}
#'
#' @import lmerTest lattice
#'
#' @examples
#'
#' ## Response Surface Design with incomplete blocking (page 255)
#' data(DataSet8.3)
#' DataSet8.3$block <- factor(x = DataSet8.3$block)
#' DataSet8.3$aa <- factor(x = DataSet8.3$a)
#' DataSet8.3$bb <- factor(x = DataSet8.3$b)
#' DataSet8.3$cc <- factor(x = DataSet8.3$c)
#'
#' library(lmerTest)
#' library(lattice)
#'
#' Exam8.3.fm1 <-
#'          lmer(
#'              y ~ aa:bb:cc + a + b + c +
#'                  I(a^2) + I(b^2) + I(c^2) +
#'                  a*b + a*c + b*c + (1|block)
#'            , data = DataSet8.3
#'            )
#'
#' ##--- page 256
#' anova(Exam8.3.fm1, ddf = "Kenward-Roger", type = 1)
#'
#'
#' Exam8.3.fm2 <-
#'            lmer(
#'                 y ~ a + b + c +
#'                     I(a^2) + I(b^2) + I(c^2) +
#'                     a*b + a*c + b*c + (1|block)
#'               , data = DataSet8.3
#'               )
#' ##--- page 257
#' anova(Exam8.3.fm2, ddf = "Kenward-Roger", type = 1)
#'
#' ##--- page 257
#' Exam8.3.fm3 <-
#'         lmer(
#'              y ~ a + b + c +
#'                  I(a^2) + I(b^2) +
#'                  a*c + b*c + (1|block)
#'           , DataSet8.3
#'           )
#' anova(Exam8.3.fm3, ddf = "Kenward-Roger", type = 1)
#'
#' ##--- scatter plot with regression plane by using Hoerl function ( page#233)
#' a <- seq(from = -1, to = 1, by = 1)
#' b <- seq(from = -1, to = 1, by = 1)
#' c <- seq(from = -1, to = 1, by = 1)
#' abc <- expand.grid(a = a, b = b, c = c)
#'
#' Yhat <- NULL
#' for(i in 1:nrow(abc)) {
#' Yhat[i] <- 50.08500 + 1.6*abc$a[i] + 1.69375*abc$b[i] +  0.51875*abc$c[i]-
#'            3.30250*I((abc$a[i])^2)-3.51500*I((abc$b)^2)[i] -
#'            0.52500*(abc$a)[i]*(abc$c)[i]-1.16250*(abc$b)[i]*(abc$c)[i]
#' }
#'
#' Newdata <- data.frame(abc, Yhat)
#' Plot1 <-
#'   wireframe(Yhat ~ b*a, data = subset(Newdata,c==-1),
#'   xlab = "b", ylab = "a",
#'   main = "Predicte response surface at C=-1",  colorkey = FALSE,
#'   drape = TRUE, scales = list(arrows = FALSE),xlim=c(max(b),(min(b))),
#'   screen = list(z = -50, x =-70)
#' )
#'
#' Plot2 <-
#'   wireframe(Yhat ~ b*a, data = subset(Newdata,c==0),
#'   xlab = "b", ylab = "a",
#'   main = "Predicte response surface at C=0",  colorkey = FALSE ,
#'   drape = TRUE, scales = list(arrows = FALSE),xlim=c(max(b),(min(b))),
#'   screen = list(z = -50, x =-70)
#' )
#'
#' Plot3 <-
#'  wireframe(Yhat ~ b*a, data = subset(Newdata,c==1),
#'   xlab = "b", ylab = "a",
#'   main = "Predicte response surface at C=1",  colorkey = FALSE,
#'   drape = TRUE, scales = list(arrows = FALSE),xlim=c(max(b),(min(b))),
#'   screen = list(z = -50, x =-70)
#' )
#'
#' print(Plot1)
#' print(Plot2)
#' print(Plot3)
#'
NULL