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# #######################################################################
# #STUDENT T
# #######################################################################
#
# meanvarT = function(a,b,mu,Sigma,nu)
# {
# #if(nu>=4){
# p = length(mu)
# nnu = nu/(nu-2)
# if(p==1){
# F0 = pent(b,mu,Sigma,nu) - pent(a,mu,Sigma,nu)
# nnusigma2 = nnu*Sigma
# ta = dent(a,mu,nnusigma2,nu-2)
# tb = dent(b,mu,nnusigma2,nu-2)
# F1 = mu*F0 + nnusigma2*(ta-tb)
# F2 = mu*F1 + nnusigma2*(pent(b,mu,nnusigma2,nu-2) - pent(a,mu,nnusigma2,nu-2) + ifelse(a==-Inf,0,a*ta) - ifelse(b==Inf,0,b*tb))
# return(list(mean = F1/F0,EYY = F2/F0,varcov = F2/F0 - (F1/F0)^2))
# }
# #GB = GenzBretz(maxpts = (p-1)*1e4, abseps = 1e-6, releps = 0)
# #print(GB$maxpts)
# #F0 = pmvt(lower = a-mu,upper = b-mu,df = nu,sigma = Sigma)[1]
#
# logF0 = pmvt.genz(lower = a-mu,upper = b-mu,nu = nu,sigma = Sigma,uselog2 = TRUE,N = 799)$Estimation
# F0nnu = pmvt.genz(lower = a-mu,upper = b-mu,nu = nu - 2,sigma = nnu*Sigma,N = 799)$Estimation
#
# #Vectors ca and cb
# SSigma = nnu*Sigma
# ssigma2 = diag(SSigma)
# ca = cb = a0 = a1 = rep(0,p)
# deltaA = (nu - 2 + ((a - mu)^2)/diag(SSigma))/(nu - 1)
# deltaB = (nu - 2 + ((b - mu)^2)/diag(SSigma))/(nu - 1)
# yA = (a - mu)/diag(SSigma)
# yB = (b - mu)/diag(SSigma)
#
# Wa = Wb = matrix(0,p,p)
#
# for(j in 1:p)
# {
# #W matrix construction
#
# if(a[j]!=-Inf){
# aux1 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yA[j]*SSigma[,j][-j],Sigma = deltaA[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# ca[j] = log2prod(dent(a[j],mu[j],ssigma2[j],nu-2),aux1$logF00)
# Wa[-j,j] = aux1$mean
# Wa[j,j] = a[j]
# }
# if(b[j]!= Inf){
# aux2 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yB[j]*SSigma[,j][-j],Sigma = deltaB[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# cb[j] = log2prod(dent(b[j],mu[j],ssigma2[j],nu-2),aux2$logF00)
# Wb[-j,j] = aux2$mean
# Wb[j,j] = b[j]
# }
# }
# muY = mu + log2ratio(SSigma%*%(ca - cb),logF0)
# Exx = muY%*%t(mu) + log2ratio((F0nnu*diag(p) + Wa%*%diag(ca) - Wb%*%diag(cb))%*%SSigma,logF0)
# Exx = (Exx + t(Exx))/2
# varY = Exx - muY%*%t(muY)
# return(list(mean = muY,EYY = Exx,varcov = varY))
# }
#
# #######################################################################
# #######################################################################
# #######################################################################
#
# meanvarT_lower = function(a,mu,Sigma,nu)
# {
# #if(nu>=4){
# p = length(mu)
# nnu = nu/(nu-2)
# if(p==1){
# F0 = 1 - pent(a,mu,Sigma,nu)
# nnusigma2 = nnu*Sigma
# ta = dent(a,mu,nnusigma2,nu-2)
# tb = 0
# F1 = mu*F0 + nnusigma2*(ta-tb)
# F2 = mu*F1 + nnusigma2*(1 - pent(a,mu,nnusigma2,nu-2) + ifelse(a==-Inf,0,a*ta))
# return(list(mean = F1/F0,EYY = F2/F0,varcov = F2/F0 - (F1/F0)^2))
# }
# #GB = GenzBretz(maxpts = (p-1)*1e4, abseps = 1e-6, releps = 0)
# #print(GB$maxpts)
# #F0 = pmvt(lower = a-mu,upper = b-mu,df = nu,sigma = Sigma)[1]
#
# logF0 = pmvt.genz(lower = a-mu,nu = nu,sigma = Sigma,uselog2 = TRUE,N = 799)$Estimation
# F0nnu = pmvt.genz(lower = a-mu,nu = nu - 2,sigma = nnu*Sigma,N = 799)$Estimation
#
# #Vectors ca and cb
# SSigma = nnu*Sigma
# ssigma2 = diag(SSigma)
# ca = a0 = a1 = rep(0,p)
# deltaA = (nu - 2 + ((a - mu)^2)/diag(SSigma))/(nu - 1)
# #deltaB = (nu - 2 + ((b - mu)^2)/diag(SSigma))/(nu - 1)
# yA = (a - mu)/diag(SSigma)
# #yB = (b - mu)/diag(SSigma)
#
# Wa = matrix(0,p,p)
#
# for(j in 1:p)
# {
# #W matrix construction
#
# if(a[j]!=-Inf){
# aux1 = onlymeanT0(a = a[-j],b = rep(Inf,p-1),mu = mu[-j] + yA[j]*SSigma[,j][-j],Sigma = deltaA[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# ca[j] = log2prod(dent(a[j],mu[j],ssigma2[j],nu-2),aux1$logF00)
# Wa[-j,j] = aux1$mean
# Wa[j,j] = a[j]
# }
# # if(b[j]!= Inf){
# # aux2 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yB[j]*SSigma[,j][-j],Sigma = deltaB[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# # cb[j] = log2prod(dent(b[j],mu[j],ssigma2[j],nu-2),aux2$logF00)
# # Wb[-j,j] = aux2$mean
# # Wb[j,j] = b[j]
# # }
# }
# muY = mu + log2ratio(SSigma%*%ca,logF0)
# Exx = muY%*%t(mu) + log2ratio((F0nnu*diag(p) + Wa%*%diag(ca))%*%SSigma,logF0)
# Exx = (Exx + t(Exx))/2
# varY = Exx - muY%*%t(muY)
# return(list(mean = muY,EYY = Exx,varcov = varY))
# }
#
# #######################################################################
# #######################################################################
# #######################################################################
#
# meanvarT_upper = function(b,mu,Sigma,nu)
# {
# #if(nu>=4){
# p = length(mu)
# nnu = nu/(nu-2)
# if(p==1){
# F0 = pent(b,mu,Sigma,nu)
# nnusigma2 = nnu*Sigma
# tb = dent(b,mu,nnusigma2,nu-2)
# F1 = mu*F0 - nnusigma2*tb
# F2 = mu*F1 + nnusigma2*(pent(b,mu,nnusigma2,nu-2) - ifelse(b==Inf,0,b*tb))
# return(list(mean = F1/F0,EYY = F2/F0,varcov = F2/F0 - (F1/F0)^2))
# }
# #GB = GenzBretz(maxpts = (p-1)*1e4, abseps = 1e-6, releps = 0)
# #print(GB$maxpts)
# #F0 = pmvt(lower = a-mu,upper = b-mu,df = nu,sigma = Sigma)[1]
#
# logF0 = pmvt.genz(upper = b-mu,nu = nu,sigma = Sigma,uselog2 = TRUE,N = 799)$Estimation
# F0nnu = pmvt.genz(upper = b-mu,nu = nu - 2,sigma = nnu*Sigma,N = 799)$Estimation
#
# #Vectors ca and cb
# SSigma = nnu*Sigma
# ssigma2 = diag(SSigma)
# cb = a0 = a1 = rep(0,p)
# #deltaA = (nu - 2 + ((a - mu)^2)/diag(SSigma))/(nu - 1)
# deltaB = (nu - 2 + ((b - mu)^2)/diag(SSigma))/(nu - 1)
# #yA = (a - mu)/diag(SSigma)
# yB = (b - mu)/diag(SSigma)
#
# Wb = matrix(0,p,p)
#
# for(j in 1:p)
# {
# #W matrix construction
#
# # if(a[j]!=-Inf){
# # aux1 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yA[j]*SSigma[,j][-j],Sigma = deltaA[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# # ca[j] = log2prod(dent(a[j],mu[j],ssigma2[j],nu-2),aux1$logF00)
# # Wa[-j,j] = aux1$mean
# # Wa[j,j] = a[j]
# # }
# if(b[j]!= Inf){
# aux2 = onlymeanT0(a =rep(-Inf,p-1),b = b[-j],mu = mu[-j] + yB[j]*SSigma[,j][-j],Sigma = deltaB[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# cb[j] = log2prod(dent(b[j],mu[j],ssigma2[j],nu-2),aux2$logF00)
# Wb[-j,j] = aux2$mean
# Wb[j,j] = b[j]
# }
# }
# muY = mu - log2ratio(SSigma%*%cb,logF0)
# Exx = muY%*%t(mu) + log2ratio((F0nnu*diag(p) - Wb%*%diag(cb))%*%SSigma,logF0)
# Exx = (Exx + t(Exx))/2
# varY = Exx - muY%*%t(muY)
# return(list(mean = muY,EYY = Exx,varcov = varY))
# }
#
#
# #######################################################################
# #######################################################################
# #######################################################################
#
# meanvarT_finite = function(a,b,mu,Sigma,nu)
# {
# #if(nu>=4){
# p = length(mu)
# nnu = nu/(nu-2)
# if(p==1){
# F0 = pent(b,mu,Sigma,nu) - pent(a,mu,Sigma,nu)
# nnusigma2 = nnu*Sigma
# ta = dent(a,mu,nnusigma2,nu-2)
# tb = dent(b,mu,nnusigma2,nu-2)
# F1 = mu*F0 + nnusigma2*(ta-tb)
# F2 = mu*F1 + nnusigma2*(pent(b,mu,nnusigma2,nu-2) - pent(a,mu,nnusigma2,nu-2) + a*ta - b*tb)
# return(list(mean = F1/F0,EYY = F2/F0,varcov = F2/F0 - (F1/F0)^2))
# }
# #GB = GenzBretz(maxpts = (p-1)*1e4, abseps = 1e-6, releps = 0)
# #print(GB$maxpts)
# #F0 = pmvt(lower = a-mu,upper = b-mu,df = nu,sigma = Sigma)[1]
#
# logF0 = pmvt.genz(lower = a-mu,upper = b-mu,nu = nu,sigma = Sigma,uselog2 = TRUE,N = 799)$Estimation
# F0nnu = pmvt.genz(lower = a-mu,upper = b-mu,nu = nu - 2,sigma = nnu*Sigma,N = 799)$Estimation
#
# #Vectors ca and cb
# SSigma = nnu*Sigma
# ssigma2 = diag(SSigma)
# ca = cb = a0 = a1 = rep(0,p)
# deltaA = (nu - 2 + ((a - mu)^2)/diag(SSigma))/(nu - 1)
# deltaB = (nu - 2 + ((b - mu)^2)/diag(SSigma))/(nu - 1)
# yA = (a - mu)/diag(SSigma)
# yB = (b - mu)/diag(SSigma)
#
# Wa = Wb = matrix(0,p,p)
#
# for(j in 1:p)
# {
# #W matrix construction
# aux1 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yA[j]*SSigma[,j][-j],Sigma = deltaA[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# ca[j] = log2prod(dent(a[j],mu[j],ssigma2[j],nu-2),aux1$logF00)
# Wa[-j,j] = aux1$mean
# Wa[j,j] = a[j]
#
# aux2 = onlymeanT0(a = a[-j],b = b[-j],mu = mu[-j] + yB[j]*SSigma[,j][-j],Sigma = deltaB[j]*(SSigma[-j,-j] - SSigma[,j][-j]%*%t(SSigma[j,][-j])/ssigma2[j]),nu = nu-1)
# cb[j] = log2prod(dent(b[j],mu[j],ssigma2[j],nu-2),aux2$logF00)
# Wb[-j,j] = aux2$mean
# Wb[j,j] = b[j]
# }
# muY = mu + log2ratio(SSigma%*%(ca - cb),logF0)
# Exx = muY%*%t(mu) + log2ratio((F0nnu*diag(p) + Wa%*%diag(ca) - Wb%*%diag(cb))%*%SSigma,logF0)
# Exx = (Exx + t(Exx))/2
# varY = Exx - muY%*%t(muY)
# return(list(mean = muY,EYY = Exx,varcov = varY))
# }
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