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summary.bgeva <- function(object,s.meth="svd",sig.lev=0.05,...){
testStat <- function (p, X, V, rank = NULL) {
qrx <- qr(X)
R <- qr.R(qrx)
V <- R %*% tcrossprod(V[qrx$pivot, qrx$pivot],R)
V <- (V + t(V))/2
ed <- eigen(V, symmetric = TRUE)
k <- max(0, floor(rank))
nu <- abs(rank - k)
if (rank > k + 0.05 || k == 0)
k <- k + 1
nu <- 0
rank <- k
if (nu > 0)
k1 <- k + 1
else k1 <- k
r.est <- sum(ed$values > max(ed$values) * .Machine$double.eps^0.9)
if (r.est < k1) {
k1 <- k <- r.est
nu <- 0
rank <- r.est
}
vec <- ed$vectors
if (k1 < ncol(vec))
vec <- vec[, 1:k1, drop = FALSE]
if (k == 0) {
vec <- t(t(vec) * sqrt(nu/ed$val[1]))
}
if (nu > 0 && k > 0) {
if (k > 1)
vec[, 1:(k - 1)] <- t(t(vec[, 1:(k - 1)])/sqrt(ed$val[1:(k -
1)]))
b12 <- 0.5 * nu * (1 - nu)
if (b12 < 0)
b12 <- 0
b12 <- sqrt(b12)
B <- matrix(c(1, b12, b12, nu), 2, 2)
ev <- diag(ed$values[k:k1]^-0.5)
B <- ev %*% B %*% ev
eb <- eigen(B, symmetric = TRUE)
rB <- eb$vectors %*% tcrossprod(diag(sqrt(eb$values)),eb$vectors)
vec[, k:k1] <- t(tcrossprod(rB,vec[, k:k1]))
}
else {
vec <- t(t(vec)/sqrt(ed$val[1:k]))
}
d <- crossprod(vec,R%*%p)
d <- sum(d^2)
attr(d, "rank") <- rank
d
}
lf <- length(coef(object))
F <- object$F[1:lf,1:lf]
Vr <- object$Vb[1:lf,1:lf]
table1.1 <- NULL
l.sp <- object$l.sp
SE <- sqrt( diag(object$Vb) )
n <- object$n
estimate1 <- coef(object)[1:(object$gam.fit$nsdf)]
se1 <- SE[1:(object$gam.fit$nsdf)]
ratio1 <- estimate1/se1
pv1 <- 2*pnorm(abs(ratio1), lower.tail = FALSE)
table1 <- cbind(estimate1,se1,ratio1,pv1)
dimnames(table1)[[2]] <- c("Estimate", "Std. Error", "z value", "Pr(>|z|)")
if(l.sp!=0){
pTerms.df1 <- pTerms.chi.sq1 <- pTerms.pv1 <- edf1 <- NA
for(k in 1:l.sp){
ind <- (object$gam.fit$smooth[[k]]$first.para):(object$gam.fit$smooth[[k]]$last.para)
edf1[k] <- sum(diag(F)[ind])
names(edf1)[k] <- object$gam.fit$smooth[[k]]$label
b <- coef(object)[ind]
V <- Vr[ind,ind]
Xt <- object$X[, 1:length(ind)+object$gam.fit$nsdf]
pTerms.df1[k] <- min(ncol(Xt), edf1[k])
pTerms.chi.sq1[k] <- Tp <- testStat(b, Xt, V, pTerms.df1[k])
pTerms.df1[k] <- attr(Tp, "rank")
pTerms.pv1[k] <- pchisq(pTerms.chi.sq1[k], df = pTerms.df1[k], lower.tail = FALSE)
}
table1.1 <- cbind(edf1, pTerms.df1, pTerms.chi.sq1, pTerms.pv1)
dimnames(table1.1)[[2]] <- c("edf", "Est.rank", "Chi.sq", "p-value")
}
res <- list(tableP=table1,
tableNP=table1.1,
n=n, tau=object$tau,
formula=object$gam.fit$formula,
l.sp=l.sp,
t.edf=object$t.edf)
class(res) <- "summary.bgeva"
res
}
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