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# plot a diagram using diagram for a markovchain object
.plotdiagram <- function(object, ...) {
if(is(object,"markovchain")){
mat <- object@transitionMatrix
list <- .communicatingClassesRcpp(object)
sections <- length(list)
colorList <- grDevices::colors()
colorList <- sample(colorList,sections)
colorvector <- rep("white",length(object@states))
for(i in 1:length(list)){
part <- list[[i]]
for(j in 1:length(part)){
colorvector[match(part[j],object@states)] <- colorList[i]
}
}
} else if(is(object,"ctmc")){
mat <- object@generator
colorvector <- rep("white",length(object@states))
}
if(object@byrow == FALSE) {
mat <- t(mat)
}
if (!requireNamespace("diagram", quietly = TRUE)) {
print("The diagram package is not available")
} else{
diagram::plotmat(t(mat),relsize = 0.75,box.col = colorvector, ...)
}
}
# plot a diagram using DiagrammeR for a markovchain object
.plotDiagrammeR <- function(object, ...) {
if(is(object,"markovchain")){
mat <- object@transitionMatrix
} else if(is(object,"ctmc")){
mat <- object@generator
}
names <- rownames(mat)
# names of nodes
nodes <- ''
for(i in 1:nrow(mat)) {
nodes <- paste0(nodes, names[i], "; ")
}
# store edges
edges <- ''
for(i in 1:nrow(mat)) {
for(j in 1:ncol(mat)) {
edges <- paste0(edges, names[i], "->", names[j], " [label = ", mat[i,j], "] ")
}
}
# extract extra parameter
dots <- list(...)
args <- ""
for(name in names(dots)) {
args <- paste0(args, name, "=\"", dots[[name]], "\" ")
}
# print(args)
if (requireNamespace("DiagrammeR", quietly = TRUE)) {
res <- DiagrammeR::grViz(paste0("
digraph circles {
graph [overlap = true, fontsize = 10]
node [shape = circle,
fixedsize = true,
width = 0.9] // sets as circles
", nodes, "
", edges, args,"
// labelfontsize = 20 labelloc='t' label ='Weather transition matrix'
}
"))
return (res)
} else {
print("Diagrammer unavailable")
}
}
# How to do plotting?
# mcWeather <- new("markovchain", states = c("sunny", "cloudy", "rain"),
# transitionMatrix = matrix(data = c(0.70, 0.2, 0.1,
# 0.3, 0.4, 0.3,
# 0.2, 0.45, 0.35), byrow = T, nrow = 3),
# name = "Weather")
# mcWeather
# .plotdiagram(mcWeather, box.size = 0.06)
# .plotDiagrammeR(mcWeather, label ="Weather transition matrix", labelloc = "t")
# plot(mcWeather, package = "DiagrammeR", label = "Weather transition matrix")
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