Nothing
### This file contains the function for the structure plot.
plotstruct <- function(Z, X.class = NULL, sort.inside.class = TRUE,
direction = "h", main = "Structure Plot", xlab = "Observations",
ylab = "Posterior Probabilities", ...){
if(direction != "h" && direction != "v"){
stop("The direction is not found.")
}
N <- nrow(Z)
K <- ncol(Z)
color <- .Color[0:(K - 1) %% length(.Color) + 1]
if(is.null(X.class)){
class.id <- apply(Z, 1, which.max)
} else{
class.id <- X.class
}
id.X <- order(class.id)
class.id <- class.id[id.X]
Z <- Z[id.X,]
if(sort.inside.class && is.null(X.class)){
for(k in 1:K){
tmp.Z <- matrix(Z[class.id == k, ], ncol = K)
id.X <- order(tmp.Z[, k], decreasing = TRUE)
Z[class.id == k,] <- tmp.Z[id.X,]
}
}
Z.cum <- apply(Z, 1, cumsum)
n.class <- as.vector(table(class.id))
X.nc.cum <- cumsum(n.class) + 1
if(direction == "h"){
xlim <- c(1, N + 1)
ylim <- c(0, 1)
plot(NULL, NULL, type = "n", xlim = xlim, ylim = ylim,
main = main, xlab = xlab, ylab = ylab, ...)
for(n in 1:N){
x.left <- n
y.bottom <- 0
for(k in 1:K){
rect(x.left, y.bottom, x.left + 1, Z.cum[k, n],
col = color[k], border = NA)
y.bottom <- Z.cum[k, n]
}
}
abline(v = X.nc.cum[-K], lty = 3, lwd = 0.5)
} else if(direction == "v"){
xlim <- c(0, 1)
ylim <- c(N + 1, 1)
plot(NULL, NULL, type = "n", xlim = xlim, ylim = ylim,
main = main, xlab = ylab, ylab = xlab, ...)
for(n in 1:N){
y.bottom <- n
x.left <- 0
for(k in 1:K){
rect(x.left, y.bottom, Z.cum[k, n], y.bottom + 1,
col = color[k], border = NA)
x.left <- Z.cum[k, n]
}
}
abline(h = X.nc.cum[-K], lty = 3, lwd = 0.5)
}
} # End of plotstruct().
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