Nothing
.computeLinearPredictor_GA0B0ABE0<-function(allparam,
Y, X0, X, Z, W,
Id, FirstId, LastId=NULL,
nT0basis,
Spline_t0=BSplineBasis(knots=NULL, degree=3, keep.duplicates=TRUE), Intercept_t0=TRUE,
ialpha0, nX0,
ibeta0, nX,
ialpha, ibeta,
nTbasis,
Spline_t =BSplineBasis(knots=NULL, degree=3, keep.duplicates=TRUE),
Intercept_t_NPH=rep(TRUE, nX),
ieta0, iWbeg, iWend, nW,
ISpline_W =MSplineBasis(knots=NULL, degree=3, keep.duplicates=TRUE),
Intercept_W=TRUE,
bhlink=c("log", "identity"),
debug=FALSE, ...){
# compute linearpredictor (log rate) if the model
# rate = invlink(f(t)%*%gamma) exp(X0%*%alpha0 + X%*%beta0(t) + sum( alphai(zi)betai(t) )+ sum ( wce(Wi , eta0i)(t))
#################################################################################################################
#################################################################################################################
# the coef of the first t-basis is constraint to 1 for nat-spline, and n-sum(other beta) if bs using expand() method
#################################################################################################################
#################################################################################################################
#################################################################################################################
# allparam ; vector of all coefs
# gamma0 = allparam[1:nY0basis]
# alpha0= allparam[ialpha0]
# beta0= matrix(allparam[ibeta0], ncol=nX, nrow=nTbasis)
# alpha= diag(allparam[ialpha])
# beta= expand(matrix(allparam[ibeta], ncol=Z@nZ, nrow=nTbasis-1))
# beta does not contains coef for the first t-basis
# eta0 = allparamE0[ieta0]
#################################################################################################################
# Y : object of class Surv (with ncol=2 or more)
# the time at which the predictors are computed is Y[,1] if ncol=2, Y[,2] if ncol>2
# X0 : non-time dependante variable (may contain spline bases expended for non-loglinear terms)
# X : log lineair but time dependante variable
# Z : object of class "DesignMatrixNPHNLL" time dependent variables (spline basis expended)
# W : Exposure variables used in Weighted Cumulative Exposure Models
# Id : varibale indicating individuals Id, lines with the same Id are considered to be from the same individual
# FirstId : all lines in FirstId[iT]:iT in the data comes from the same individual
# nT0basis : number of spline basis
# Spline_t0, spline object for baseline hazard, with evaluate() method
# Intercept_t0=FALSE, option for evaluate, = TRUE all the basis, =FALSE all but first basis
# nTbasis : number of time spline basis for NPH or NLL effects
# nX0 : nb of PH variables dim(X0)=c(nobs, nX0)
# nX : nb of NPHLIN variables dim(X)=c(nobs, nX)
# Spline_t, spline object for time dependant effects, with evaluate() method
# Intercept_t_NPH vector of intercept option for NPH spline (=FALSE when X is NLL too, ie in case of remontet additif NLLNPH)
# nW : nb of WCE variables dim(W)=c(nobs, nW)
# iWbeg, iWend : coef of the ith WCE variable is eta0[iWbeg[i]:iWend[i]]
# ISpline_W, list of nW spline object for WCE effects, with evaluate() method
# ... not used args
# the function do not check the concorcance between length of parameter vectors and the number of knots and the Z.signature
# returned value : the log liikelihood of the model
bhlink <- match.arg(bhlink) # type baseline hazard
if(is.null(Z)){
nZ <- 0
} else {
nZ <- Z@nZ
}
# contribution of non time dependant variables
if( nX0){
PHterm <-X0 %*% allparam[ialpha0]
} else {
PHterm <- 0.0
}
# contribution of time d?pendant effect
# parenthesis are important for efficiency
if(nZ) {
# add a row of one for the first T-basis
Beta <- t(ExpandAllCoefBasis(allparam[ibeta], ncol=nZ, value=1))
# parenthesis important for speed ?
Zalphabeta <- Z@DM %*%( diag(allparam[ialpha]) %*% Z@signature %*% Beta )
if(nX) {
# add a row of 0 for the first T-basis when !Intercept_T_NPH
Zalphabeta <- Zalphabeta + X %*% t(ExpandCoefBasis(allparam[ibeta0],
ncol=nX,
splinebasis=Spline_t,
expand=!Intercept_t_NPH,
value=0))
}
} else {
if(nX) {
Zalphabeta <- X %*% t(ExpandCoefBasis(allparam[ibeta0],
ncol=nX,
splinebasis=Spline_t,
expand=!Intercept_t_NPH,
value=0))
}
}
if(nW){
IS_W<- ISpline_W
eta0 <- allparam[ieta0]
for(iW in 1:nW){
if(Intercept_W[[iW]]){
IS_W[[iW]] <- ISpline_W[[iW]] * eta0[iWbeg[iW]:iWend[iW]]
}
else {
IS_W[[iW]]<- ISpline_W[[iW]] * c(0, eta0[iWbeg[iW]:iWend[iW]])
}
}
# eta0 = NULL because IS_W = ISpline_W * eta0
WCEcontrib <- weighted_cummulative_exposure(Increment=W, fromT=Y[,1], toT=, Y[,2], FirstId=FirstId, LastId=LastId,
theT=Y[,4], tId=LastId,
eta0=NULL, iWbeg=iWbeg, iWend=iWend, ISpline_W = IS_W, Intercept_W=Intercept_W)
}
# spline bases for baseline hazard
colEndTime <- ifelse(ncol(Y)==2, 1, 2)
if(is.null(Spline_t0)){
YT0Gamma0 <- 0.0
}
else {
igamma0 <- 1:nT0basis
if(Intercept_t0){
tmpgamma0 <- allparam[igamma0]
}
else {
tmpgamma0 <- c(0, allparam[igamma0])
}
# baseline hazard at the end of the interval
Spt0g <- Spline_t0*tmpgamma0
YT0Gamma0 <- predictSpline(Spt0g, Y[,2])
}
# spline bases for each TD effect
if(nX + nZ){
# spline bases for each TD effect at the end of the interval
YT <- evaluate(Spline_t, Y[,2], intercept=TRUE)
if(nW){
linpred <- PHterm + apply(YT * Zalphabeta, 1, sum) + apply(WCEcontrib, 1, sum)
}
else {
linpred <- PHterm + apply(YT * Zalphabeta, 1, sum)
}
} else {
if(nW){
linpred <- PHterm + apply(WCEcontrib, 1, sum)
}
else {
linpred <- PHterm
}
}
if(bhlink == "log"){
linpred <- linpred + YT0Gamma0
} else {
linpred <- cbind(linpred , YT0Gamma0)
dimnames(linpred)[[2]] <- c("linpred", "baseline")
}
linpred
}
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