opt.survPC <-
function (thetas) {
thetas <- relist(thetas, skeleton = list.thetas)
gammas <- thetas$gammas
alpha <- thetas$alpha
Dalpha <- thetas$Dalpha
xi <- exp(thetas$log.xi)
eta.tw <- if (!is.null(WW)) as.vector(WW %*% gammas) else 0
eta.t <- switch(parameterization,
"value" = eta.tw + c(WintF.vl %*% alpha) * Y,
"slope" = eta.tw + c(WintF.sl %*% Dalpha) * Y.deriv,
"both" = eta.tw + c(WintF.vl %*% alpha) * Y + c(WintF.sl %*% Dalpha) * Y.deriv)
eta.s <- switch(parameterization,
"value" = c(Ws.intF.vl %*% alpha) * Ys,
"slope" = c(Ws.intF.sl %*% Dalpha) * Ys.deriv,
"both" = c(Ws.intF.vl %*% alpha) * Ys + c(Ws.intF.sl %*% Dalpha) * Ys.deriv)
log.hazard <- log(xi[ind.D]) + eta.t
log.survival <- - exp(eta.tw) * rowsum(xi[ind.K] * wkP * exp(eta.s), id.GK, reorder = FALSE)
dimnames(log.survival) <- NULL
log.p.tb <- d * log.hazard + log.survival
p.bytn <- p.byt * log.p.tb
-sum(p.bytn %*% wGH, na.rm = TRUE)
}
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