[英]R Shiny: How to start and stop an iteration / animation using action buttons
[英]Implement zoom and reset functionality using action buttons in R shiny
給定的R腳本從虹膜數據創建一個帶有四個操作按鈕和一個反應性scatterPlot的tabPanel。 我想在其他三個按鈕上啟用功能,例如第二個按鈕放大繪圖,第三個按鈕縮小,第四個按鈕重置在繪圖上所做的選擇。 我嘗試了“ zoom”包和zm(),但沒有達到我的目的。 請幫忙,謝謝。
## app.R ##
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Zoom and Reset Dashboard",titleWidth = 290),
dashboardSidebar(
width = 0
),
dashboardBody(
# Creation of tabs and tabsetPanel
tabsetPanel(type = "tab",
tabPanel("Resource Dashboard",
fluidRow(
column(1,
tags$head(
tags$style(HTML('#buttonresfreqone:hover {
background-color: #008CBA;
color: #ffffff;
width: 150%;
}'))
),
tags$br(actionButton("buttonresfreqone",
"Activity",style="color: #000000; width:100%;height:50px; ")),
tags$br(),
tags$head(
tags$style(HTML('#buttonresfreqtwo:hover {
background-color: #008CBA;
color: #ffffff;
width: 150%;
}'))
),
tags$br(actionButton("buttonresfreqtwo",
"Zoom-In",style="color: #000000; width:100%;height:50px; ")),
tags$br(),
tags$head(
tags$style(HTML('#buttonresfreqthree:hover {
background-color: #008CBA;
color: #ffffff;
width: 150%;
}'))
),
tags$br(actionButton("buttonresfreqthree",
"Zoom-Out",style="color: #000000; width:100%;height:50px; ")),
tags$br(),
tags$head(
tags$style(HTML('#buttonresfreqfour:hover {
background-color: #008CBA;
color: #ffffff;
width: 150%;
}'))
),
tags$br(actionButton("buttonresfreqfour",
HTML("Reset"),
style="color: #000000;
width:100%;height:50px;"))),
tags$br(),
column(10,
box(title = "Resource Frequency", status =
"primary",height = "460",width = "550", solidHeader = T,
plotOutput("res_freq_plot"))))
),
id= "tabselected"
)
))
server <- function(input, output) {
#Code for Resource Dashboard Resource Frequency Plots
values_res_freq <- reactiveValues(res_freq_one = 0, res_freq_two = 0,
res_freq_three = 0,
res_freq_four = 0, res_freq_five = 0)
observeEvent(input$buttonresfreqone, {
values_res_freq$res_freq_one <- 1
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
})
observeEvent(input$buttonresfreqtwo, {
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 1
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
})
observeEvent(input$buttonresfreqthree, {
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 1
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
})
observeEvent(input$buttonresfreqfour, {
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 1
values_res_freq$res_freq_five <- 0
})
output$res_freq_plot <- renderPlot(
{
if(values_res_freq$res_freq_one)
plot(iris$Sepal.Length)
else
return()
}
)
}
shinyApp(ui, server)
您可以按照此鏈接中的建議將高度和寬度賦予renderPlot函數。
第一步是使用默認值創建高度和寬度的反應值,然后根據單擊按鈕的要求更改高度和寬度值。
我已經修改了您的服務器代碼以做到這一點。 希望能幫助到你!
server <- function(input, output) {
#Code for Resource Dashboard Resource Frequency Plots
values_res_freq <- reactiveValues(res_freq_one = 0, res_freq_two = 0,
res_freq_three = 0,
res_freq_four = 0, res_freq_five = 0)
#Reactive values for height and width of the plot
Val <- reactiveValues(height = 400, width = 600)
observeEvent(input$buttonresfreqone, {#Activity
values_res_freq$res_freq_one <- 1
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
})
observeEvent(input$buttonresfreqtwo, {#Zoom in
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 1
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
#Increase height and width
Val$height <- Val$height *1.25
Val$width <- Val$width *1.25
})
observeEvent(input$buttonresfreqthree, {#Zoom out
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 1
values_res_freq$res_freq_four <- 0
values_res_freq$res_freq_five <- 0
#Decrease height and width
Val$height <- Val$height /1.25
Val$width <- Val$width /1.25
})
observeEvent(input$buttonresfreqfour, {#Reset
values_res_freq$res_freq_one <- 0
values_res_freq$res_freq_two <- 0
values_res_freq$res_freq_three <- 0
values_res_freq$res_freq_four <- 1
values_res_freq$res_freq_five <- 0
#Set default value for height and width
Val$height <- 400
Val$width <- 600
})
observe({
output$res_freq_plot <- renderPlot(
{
if(values_res_freq$res_freq_one)
plot(iris$Sepal.Length)
else
return()
}, height = Val$height, width = Val$width
)
})
}
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