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#' @rdname plot
#' @export
#' @importFrom graphics plot lines abline text par
plot.HDBRR <- function(x, crit = log(4), var_select = FALSE, post = FALSE, ...){
fit <- x
if(!inherits(fit, "HDBRR")) stop("This function only works for objects of class 'HDBRR'\n");
n <- nrow(fit$x)
phat <- abs(fit$phat)
betahat <- fit$betahat
bf <- phat/(1-phat)
bf <- 2*log(bf)
id.pos2 <- which(bf >= crit)
Inter <- fit$intercept
if(Inter == 1){
files <- as.matrix(c("(Intercept)", colnames(fit$x)[-1]))
d <- which(duplicated(files))[1]
if(!is.na(d)){
p <- dim(as.matrix(fit$x))[2]
colnames(fit$x)[-1] <- paste("X",1:(p-1),sep="")
}
files <- as.matrix(c("(Intercept)", colnames(fit$x)[-1]))
}
else{
files <- as.matrix(colnames(fit$x))
d <- which(duplicated(files))[1]
if(!is.na(d)){
p <- dim(as.matrix(fit$x))[2]
colnames(fit$x) <- paste("X",1:p,sep="")
}
files <- as.matrix(colnames(fit$x))
}
if(var_select == TRUE){
par(mfrow=c(1,1))
plot(betahat,phat, xlab = expression(paste(hat(beta))), ylab = expression(paste(hat(p))))
points(betahat[id.pos2],phat[id.pos2],col=2)
text(betahat[id.pos2],phat[id.pos2],files[id.pos2])
readline(prompt="Press [enter] to continue to next graph")
}
par(mfrow=c(1,1))
plot(fit$y,fit$yhat, xlab = "y observed", ylab = "y predicted")
abline(a=0,b=1)
text(quantile(fit$yhat)[[5]],-quantile(fit$yhat)[[5]],paste("cor=",round(cor(fit$y,fit$yhat),4)))
readline(prompt="Press [enter] to continue to next graph")
par(mfrow=c(1,1))
plot(fit$betahat, ylab = "Coefficients")
readline(prompt="Press [enter] to continue to next graph")
par(mfrow=c(1,1))
plot(sqrt(fit$varb),ylab="Std. dev.")
readline(prompt="Press [enter] to continue to next graph")
par(mfrow=c(1,1))
plot(fit$betahat/sqrt(fit$varb),ylab="SNR")
points(id.pos2,fit$betahat[id.pos2]/sqrt(fit$varb[id.pos2]),col="red")
abline(h=-qt(0.975,n-1))
abline(h=qt(0.975,n-1))
if(post == TRUE){
readline(prompt="Press [enter] to continue to next graph")
par(mfrow=c(1,1))
plot(fit$u, fit$postu, type = "l", xlab = "u", ylab = expression(paste(pi (u))), main = "Marginal posterior of u")
}
}
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