Skip to content

Instantly share code, notes, and snippets.

@zmjones zmjones/example.R
Last active Aug 29, 2015

Embed
What would you like to do?
shiny/ggvis version of plotLearningCurve
library(mlr) ## head
library(shiny)
r = generateLearningCurve(list("classif.rpart", "classif.knn"),
task = sonar.task, percs = seq(0.2, 1, by = 0.2),
measures = list(tpr, fpr, fn, fp),
resampling = makeResampleDesc(method = "Subsample", iters = 5),
show.info = FALSE)
plotLearningCurve(r, interactive = TRUE)
plotLearningCurve = function(obj, color_variable = NULL, interactive = FALSE) {
plt_data = reshape2::melt(obj, id.vars = c("learner", "perc"), variable.name = "measure", value.name = "perf")
nmeas = length(unique(plt_data$measure))
nlearn = length(unique(plt_data$learner))
if (is.null(color_variable) & nmeas == 1) {
color_variable = "learner"
interactive = FALSE
} else if (is.null(color_variable) & nlearn == 1) {
color_variable = "measure"
interactive = FALSE
} else if (is.null(color_variable) & interactive) {
if (nlearn > nmeas) {
color_variable = "measure"
pick_variable = "learner"
} else {
color_variable = "learner"
pick_variable = "measure"
}
} else if (interactive) {
if (color_variable == "measure")
pick_variable = "learner"
else
pick_variable = "measure"
} else {
stop("cannot plot multiple learners and multiple measures statically")
}
if (interactive) {
ui = shiny::shinyUI(
shiny::pageWithSidebar(
shiny::headerPanel("learning curve"),
shiny::sidebarPanel(
shiny::selectInput("level_variable",
paste("choose a ", pick_variable),
unique(levels(plt_data[[pick_variable]])))
),
shiny::mainPanel(
shiny::uiOutput("ggvis_ui"),
ggvis::ggvisOutput("ggvis")
)
))
server = shiny::shinyServer(function(input, output) {
plt_data_sub = shiny::reactive(plt_data[which(plt_data[[pick_variable]] == input$level_variable), ])
plt = ggvis::ggvis(plt_data_sub, ggvis::prop("x", as.name("perc")),
ggvis::prop("y", as.name("perf")),
ggvis::prop("stroke", as.name(color_variable)))
plt = ggvis::layer_lines(plt)
plt = ggvis::layer_points(plt, ggvis::prop("fill", as.name(color_variable)))
ggvis::bind_shiny(plt, "ggvis", "ggvis_ui")
})
shiny::shinyApp(ui, server)
} else {
plt = ggvis::ggvis(plt_data, ggvis::prop("x", as.name("perc")),
ggvis::prop("y", as.name("perf")),
ggvis::prop("stroke", as.name(color_variable)))
plt = ggvis::layer_lines(plt)
ggvis::layer_points(plt, ggvis::prop("fill", as.name(color_variable)))
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.