Nothing
U_it<-function(prev.results){
if (missing(prev.results)){
stop("No elementos para iteracion, No elements for iteration")
} else {
if(prev.results$bin[1]==0){
stop("El proceso ya esta bajo control, The process is already under control")
} else {
u.0 <- prev.results$data.0
u.pos<-prev.results$in.control
u.1<-u.0[u.pos,]
m <- nrow(u.1)
ui.1 <- u.1$d/u.1$n
# Calculo de limites de control para la grafica u
LCS.u.1<-expression(mean(ui.1)+3*sqrt(mean(ui.1)/mean(u.1$n)))
LCI.u.1<-expression(mean(ui.1)-3*sqrt(mean(ui.1)/mean(u.1$n)))
LC.u.1<-expression(mean(ui.1))
if (eval(LCI.u.1)>0){
LCI.u.1<-eval(LCI.u.1)
} else {
LCI.u.1 <- 0
}
u.pos<-which(ui.1 >= eval(LCI.u.1) & ui.1 < eval(LCS.u.1))
ui.2<-ui.1[u.pos]
u.fi.1<-which(ui.1 < eval(LCI.u.1))
u.fs.1<-which(ui.1 >= eval(LCS.u.1))
bin.u<-if(length(u.pos)< m){
bin.u<-1
} else {
bin.u<-0
}
#
# Script para Grafica U inicial
plot.u<-function(U=ui.1,type="b",col="blue",pch =19){
plot(U, xlab= "Numero de muestra", ylab="Numero de inconformidades por unidad",
main="Grafica U, Control Estadistico de la Calidad",type=type, col=col,
ylim=c(eval(LCI.u.1)-mean(ui.1)*0.05, max(eval(LCS.u.1)*1.1, max(ui.1)*1.1)),
xlim=c(-0.05*m, 1.05*m), pch = pch)
abline(h= c(eval(LCS.u.1), eval(LCI.u.1), eval(LC.u.1)),col="lightgray")
text(c(rep(1,3),rep(7,3)), rep(c(eval(LCS.u.1),eval(LC.u.1),eval(LCI.u.1)),2),
c(c("LCS = ","LC = ","LCI = "), c(round(eval(LCS.u.1),3), round(eval(LC.u.1),3),
round(eval(LCI.u.1),3))),
col="red") }
plot.u()
# Crea la lista de los resultados
structure(list("in.control" = u.pos,
"out.control"= c(u.fi.1,u.fs.1),
"Iteraciones" = prev.results$Iteraciones + 1,
"data.0"= prev.results$data.0,
"data.1"= ui.2,
"bin" = bin.u,
"Limites de Control Grafica U" = c("LCI.u"=eval(LCI.u.1),"LCS.u"=eval(LCS.u.1),
"LC.p"=eval(LC.u.1)),
"Conclusion del proceso"= c(if(length(u.pos)< m){
print("Proceso fuera de Control en Grafica U")
} else {
print("El proceso esta bajo control en Grafica U")
})))
}
}
}
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