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#' Time-Temperature Superposition (TTS) plots
#'
#' Plots of TTS results: experimental data, horizontal and vertical shifts,
#' TTS data, TTS Master Curve fitting with B-Splines and bootstrap confidence
#' intervals are deployed.
#'
#' TTS plots are performed from the outputs of TTS function: data, aT, bT,
#' TTS.data, TTS.gam y residuals.
#'
#' @param x TTS object.
#' @return The following values are returned: \item{PLOT.data()}{Generic
#' function to plot the experimental data. By default log10.module versus
#' log10.frequency.} \item{PLOT.aT()}{Generic plot of the horizontal shifts
#' corresponding to each curve (modulus versus frequency) obtained on
#' temperature.} \item{PLOT.bT()}{Generic plot of the vertical shifts
#' corresponding to each curve (modulus versus frequency) obtained on
#' temperature.} \item{PLOT.TTS.data()}{Generic plot of the experimental data
#' horizontally and vertically shifted with respect to a the curve
#' corresponding to the reference temperature.} \item{PLOT.TTS.gam()}{Generic
#' plot of the Master Curve B-splines estimation with bootstrap confidence
#' intervals at 95 per cent.} \item{PLOT.res()}{Generic plot of the residuals
#' of Master Curve B-splines fitting.}
#' @author Antonio Meneses \email{antoniomenesesfreire@@hotmail.com}, Salvador
#' Naya \email{salva@@udc.es} and Javier Tarrio-Saavedra
#' \email{jtarrio@@udc.es}
#' @references Naya, S., Meneses A., Tarrio-Saavedra, J., Artiaga R.,
#' Lopez-Beceiro, J. and Gracia-Fernandez C. (2013) New method for estimating
#' shift factors in time-temperatura superposition models. Journal of Thermal
#' Analysis and Calorimetry. ISSN 1388-6150. DOI 10.1007/s10973-013-3193-1.\cr
#'
#' Williams, M. L. (1964) Structural analysis of Viscoelastic materials. AIAA
#' Journal, 785-808.\cr
#'
#' Artiaga R., Garcia A. Fundamentals of DMA. In: 'Thermal analysis.
#' Fundamentals and applications to material characterization' (ed.: Artiaga
#' R.) Publicaciones de la Universidade da Coruna, A Coruna, Spain, 183-206
#' (2005).\cr
#' @keywords TTS.PLOT()
#' @examples
#'
## library(TTS)
#' ## TTS object applied to PC dataset.
#' data(PC)
#' Derive <- TTS(PC)
#' x <- Derive
#' ## Generic plots for TTS analysis
#' PLOT <- PLOT.TTS(x)
#' names(PLOT)
#' ##[1] "PLOT.data" "PLOT.aT" "PLOT.bT" "PLOT.TTS.data"
#' ##[5] "PLOT.TTS.gam" "PLOT.res"
#' ## Generic plots of: data, aT, bT, TTS.data, TTS.gam and res
#' PLOT$PLOT.data(main="PLOT: Data",xlab="log10.Frequency (rad/s)",ylab="log10.E'(Pa)")
#' PLOT$PLOT.aT(main="PLOT: horizontal translation factors", xlab="Temperature", ylab="aT")
#' PLOT$PLOT.bT(main="PLOT: vertical translation factors", xlab="Temperature",ylab="bT")
#' PLOT$PLOT.TTS.data(xlab="log10.Frequency (rad/s)",ylab="log10.E'(Pa)")
#' PLOT$PLOT.TTS.gam( xlab="log10.Frequency (rad/s)", ylab = "log10.E'(Pa)",
#' main = "Fitted gam, Bootstrap confidence intervals",
#' sub = "Reference temperature = 150 degrees celsius")
#' PLOT$PLOT.res(main="TTS: gam residual", xlab="Fitted", ylab="Standardized residuals")
#'
#' @export PLOT.TTS
PLOT.TTS <-
function(x){
if(x$data[1,2]<=x$data[length(x$data[,2][x$data[,3]==unique(x$data[,3])[1]]),2])
{ m <- 1
}else m <- 2
PLOT.data <- function(y=x$data,...){
COL <- c(1:7,colors()[82:150])
plot.data <- plot(subset(y[,c(1,2)],y[,3]==unique(y[,3])[1]),type="b",
xlim=c(min(y[,1]),max(y[,1])),ylim=c(min(y[,2]),max(y[,2])),
col=1,las=1,pch=20,cex=2,...)
for(i in 2:length(unique(y[,3])))
points(subset(y[,c(1,2)],y[,3]==unique(y[,3])[i]),type="b",col=COL[i],pch=20,cex=2)
if(m==1) POS <- "bottomright" else POS <- "topright"
legend(POS,c("Temperature",as.character(unique(y[,3]))),
col=c(0,COL),lty=3,lwd=5,bty="n")
}
PLOT.aT <- function(y=x$aT,z=unique(x$data[,3]),...)
plot(z,y,type="b", lwd=3,pch=20,las=1,col=4,...)
PLOT.bT <- function(y=x$bT,z=unique(x$data[,3]),...)
plot(z,y,type="b",lwd=3,pch=20,las=1,col=4,...)
PLOT.TTS.data <- function(y=x$TTS.data,z=x$ref.temp,...){
COL <- c(1:7,colors()[82:150])
plot.data <- plot(subset(y[,c(1,2)],y[,3]==unique(y[,3])[1]),type="p",
xlim=c(min(y[,1]),max(y[,1])),ylim=c(min(y[,2]),max(y[,2])),
main=paste("PLOT: TTS\n Reference temperature = ",z),
col=1,las=1,pch=20,cex=2,...)
for(i in 2:length(unique(y[,3])))
points(subset(y[,c(1,2)],y[,3]==unique(y[,3])[i]),type="p",col=COL[i],pch=20,cex=2)
if(m==1) POS <- "bottomright" else POS <- "topright"
legend(POS,c("Temperature",as.character(unique(y[,3]))),
col=c(0,COL),lty=3,lwd=5,bty="n")
}
PLOT.TTS.gam <- function(y=x$TTS.data,z=x$ref.temp,u=x$TTS.gam,v=x$I.lower,w=x$I.upper,...){
COL <- c(1:7,colors()[82:150])
plot.data <- plot(subset(y[,c(1,2)],y[,3]==unique(y[,3])[1]),type="p",
xlim=c(min(y[,1]),max(y[,1])),ylim=c(min(y[,2]),max(y[,2])),
col=1,las=1,pch=1,cex=1,lwd=3,...)
for(i in 2:length(unique(y[,3])))
points(subset(y[,c(1,2)],y[,3]==unique(y[,3])[i]),type="p",col=COL[i],pch=1,cex=1,lwd=3)
if(m==1) POS <- "bottomright" else POS <- "topright"
legend("bottomright",c("Temperature",as.character(unique(y[,3]))),
col=c(0,COL),lty=3,lwd=5,bty="n")
points(u,col=4,type="l",lwd=3)
lines(u[,1],v,lty=2,col=2)
lines(u[,1],w,lty=2,col=2)
}
res.stand <- (x$residuals-mean(x$residuals))/sd(x$residuals)
PLOT.res <- function(y=res.stand,z=x$TTS.gam,...){
plot(z[,2],y,type="p", cex=1.5, pch=20, las=1, col=4,...)
abline(h=0,lwd=2,col=2)
}
list(PLOT.data=PLOT.data, PLOT.aT=PLOT.aT, PLOT.bT=PLOT.bT, PLOT.TTS.data=PLOT.TTS.data,
PLOT.TTS.gam=PLOT.TTS.gam,PLOT.res=PLOT.res)
}
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