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[英]Problem using selectInput to download multiple variables from data in R Shiny
[英]Subset data in R Shiny using Multiple Variables
我是R Shiny
的新手。 我正在嘗試創建一個app
,允許用戶根據多個變量對data.frame
進行subset
化,然后查看結果數據。
這是一個小的示例數據集:
iter,wave,apples
1,1,600
1,1,500
1,1,400
1,2,300
1,2,200
1,2,100
2,1,1000
2,1,1100
2,1,1200
2,2,1300
2,2,1400
2,2,1500
3,1,1100
3,1,2200
3,1,3300
3,2,4400
3,2,5500
3,2,6600
我希望用戶能夠指定iter
和wave
的值並查看結果數據。
這是我對Shiny
代碼的嘗試。 我意識到我一定犯了幾個愚蠢的錯誤。
編輯
這是我修改后的代碼。 最終結果現在非常接近我想要的。 sidebar
仍未完美顯示。
library(shiny)
setwd('C:/Users/mark_/Documents/simple_RShiny_files/explore')
apple.data <- read.csv('subset_data_based_on_multiple_variables.csv',
header = TRUE, stringsAsFactors = FALSE)
ui <- fluidPage(
titlePanel("Subsetting Apple Dataset"),
sidebarLayout(
sidebarPanel(
uiOutput("codePanel")
),
mainPanel(
tableOutput("view")
)
),
selectInput("codeInput", inputId ="data1", label = "Choose Iter", choices = unique(apple.data$iter)),
selectInput("codeInput", inputId ="data2", label = "Choose Wave", choices = unique(apple.data$wave))
)
server <- function(input, output) {
output$codePanel <- renderUI({
})
dataset <- reactive({
subset(apple.data, (iter == input$data1 & wave == input$data2))
})
output$view <- renderTable(dataset())
}
shinyApp(ui = ui, server = server)
output
問題是兩個selectInputs
具有相同的inputId
。 這有效:
library(shiny)
apple.data <- data.frame(
iter = c(1L,1L,1L,1L,1L,1L,2L,2L,2L,2L,2L,
2L,3L,3L,3L,3L,3L,3L),
wave = c(1L,1L,1L,2L,2L,2L,1L,1L,1L,2L,2L,
2L,1L,1L,1L,2L,2L,2L),
apples = c(600L,500L,400L,300L,200L,100L,1000L,
1100L,1200L,1300L,1400L,1500L,1100L,2200L,3300L,4400L,
5500L,6600L)
)
ui <- fluidPage(
titlePanel("Subsetting Apple Dataset"),
sidebarLayout(
sidebarPanel(
selectInput("codeInput1", label = "Choose Iter", choices = unique(apple.data$iter)),
selectInput("codeInput2", label = "Choose Wave", choices = unique(apple.data$wave))
),
mainPanel(
tableOutput("view")
)
)
)
server <- function(input, output) {
dataset <- reactive({
return(subset(apple.data, (iter == input$codeInput1 & wave == input$codeInput2)))
})
output$view <- renderTable(dataset())
}
shinyApp(ui = ui, server = server)
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