[英]R Shiny recoloring of points
我想要單擊選擇點並根據顏色對它們進行分組。
我可以將帶有顏色信息的選定點保存到新的數據框中並繪制它,但是我想跟蹤並查看交互式繪圖上已經選擇的內容。
如何在“添加選擇”后顯示/標記已經選擇的點或使其永久化?
library(shiny)
library(tidyverse)
library(DT)
library(colourpicker)
ui = fluidPage(
colourInput("col", "Select colour", "purple"),
actionButton("addToDT", "Add selection", icon = icon("plus")), hr(),
plotOutput("plot", click = "plot_click", dblclick = "plot_reset"),
DT::dataTableOutput('plot_DT'), hr(),
textOutput("clickcoord"),
DT::dataTableOutput('final_DT'),
plotOutput("plotSelected")
)
server = function(input, output, session) {
selectedPoint = reactiveVal(rep(FALSE, nrow(mtcars)))
output$clickcoord <- renderPrint({
print(input$plot_click)
})
observeEvent(input$plot_click, {
clicked = nearPoints(mtcars, input$plot_click, allRows = TRUE)$selected_
selectedPoint(clicked | selectedPoint())
})
observeEvent(input$plot_reset, {
selectedPoint(rep(FALSE, nrow(mtcars)))
})
output$plot_DT = DT::renderDataTable({
mtcars$sel = selectedPoint()
mtcars = dplyr::filter(mtcars, sel == TRUE) %>% mutate(group_color = input$col)
})
final_DT = reactiveValues()
final_DT$df = data.frame()
FinalData = eventReactive(input$addToDT, {
mtcars$sel = selectedPoint()
mtcars = dplyr::filter(mtcars, sel == TRUE) %>% mutate(group_color = input$col)
final_DT$df = bind_rows(final_DT$df, mtcars)
})
output$final_DT = renderDataTable({FinalData()})
output$plot = renderPlot({
mtcars$sel = selectedPoint()
ggplot(mtcars, aes(wt, mpg, color = mtcars$sel, fill=mpg)) +
geom_point(shape = 21, size = 6, stroke = 2) +
scale_color_manual(values = c("#ffffff00", input$col)) +
scale_fill_viridis_c() +
theme_bw()
})
output$plotSelected = renderPlot({
sel_df = FinalData()
ggplot(sel_df, aes(wt, mpg, fill = group_color, colour = group_color)) +
geom_point(shape = 21, size = 6, stroke = 2) +
scale_color_manual(values = unique(sel_df$group_color)) +
scale_fill_manual(values = unique(sel_df$group_color)) +
theme_bw()
})
observeEvent(input$addToDT, {
selectedPoint(rep(FALSE, nrow(mtcars)))
})
}
shinyApp(ui, server)
我認為這是您正在尋找的“關鍵”。 我使用了一個非常相似的例子,我在標題為:的幫助中找到了這個例子:
( https://shiny.rstudio.com/reference/shiny/0.13.1/plotoutput )
它與您的示例非常相似。
我創建了一個 T/F 元素矩陣,其中行是觀察值,列是選擇觀察值的批次。 因此,當您啟動時,整個矩陣為 False,但當您單擊觀察結果時,第一列中的切換為正。 然后,如果您單擊 addSelection 並繼續,您將開始切換下一列中的觀察結果。 你能確認這就是你要找的嗎? 下面是代碼。
shinyApp(
ui = basicPage(
fluidRow(
column(
width = 4,
plotOutput("plot",
height = 300,
click = "plot_click", # Equiv, to click=clickOpts(id='plot_click')
),
actionButton("addToDT", "Add selection", icon = icon("plus")), hr(),
h4("Clicked points"),
tableOutput("plot_clickedpoints"),
),
column(
width = 4,
verbatimTextOutput("counter"),
),
)
),
server = function(input, output, session) {
data <- reactive({
input$newplot
# Add a little noise to the cars data so the points move
cars + rnorm(nrow(cars))
})
output$plot <- renderPlot({
d <- data()
plot(d$speed, d$dist, main = paste("No of Sets Chosen", input$addToDT))
})
output$plot_clickinfo <- renderPrint({
cat("Click:
")
str(input$plot_click)
})
selectedPoints <- reactiveVal(rep(FALSE, nrow(cars)))
selectionMatrix <- reactiveVal(matrix(data = F, nrow = nrow(cars), ncol = 7))
observeEvent(input$plot_click, {
clicked <- nearPoints(data(), input$plot_click, "speed", "dist", allRows = TRUE)$selected
selectedPoints(clicked | selectedPoints())
tmp <- unlist(selectionMatrix())
tmp[, (input$addToDT + 1)] <- selectedPoints()
selectionMatrix(tmp)
})
observeEvent(input$addToDT, {
selectedPoints(rep(FALSE, nrow(cars)))
})
output$plot_clickedpoints <- renderTable({
# if (input$addToDT==0) {
res <- selectionMatrix()
return(res)
})
}
)
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