シャイニーを使ってアプリを作ろうとしています。 2つのドロップダウンが含まれ、1つには、銀行、鉄鋼、日用消費財などの7つの異なるセクターの名前が表示されます。もう1つのドロップダウンには、選択したセクターの会社の名前のリストが含まれている必要があります。
1.たとえば、2番目のドロップダウンの名前のリストを動的に変更する方法がわかりません。 「IT」を選択した場合、2番目のドロップダウンには「infosys」、「tcs」などが含まれます。「Bank」を選択した場合、2番目のドロップダウンmusrは「SBI」、「ICICI」などを表示します。
ui.R
library(shiny)
shinyUI(fluidPage(
titlePanel("Forecasting of stock prices and their accuracies"),
sidebarLayout(
sidebarPanel(
radioButtons("rd",
label="Select time range for training dataset",
choices=list("23 month","18 month","12 month","6 month"),
selected="23 months"),
selectInput("sector",
label="select a sector",choices=list("IT"=1,"Bank"=2,"Power"=3,"Steel"=4,
"FMCG"=5,"Infrastructure"=6,"Automobile"=7 ),
selected=1),
selectInput("stock",
label="select a option",choices=list("co.1"=1,"co.2"=2,
"co.3"=3,"co.4"=4,"co.5"=5,"
co.6"=6,"co.7"=7,"co.8"=8),
selected=1)
),
mainPanel("Display results",
textOutput("summary"),
tableOutput("view"))
)
))
server.R
shinyServer(function(input, output) {
datasetInput <- reactive({
if(input$sector=="1"){
switch(input$stock,
"1" = Infy,
"2" = TCS,
"3" = Wipro,
"4" = TechM)}
else if(input$sector=="2"){
switch(input$stock,
"1" = SBIN,
"2" = ICICI,
"3" = HDFC,
"4" = Axis,
"5" = IDBI,
"6" = PSB,
"7" = BOI,
"8" = Bob
)}
})
output$view<-renderTable({
head(datasetInput(),n=10)
})
})
データがdata.frame
にあり、業界と株式を表す変数がある場合は、renderUI
を使用して2番目のselectInput
を動的に作成できます。
i.R
library(shiny)
shinyUI(fluidPage(
titlePanel("Forecasting of stock prices and their accuracies"),
sidebarLayout(
sidebarPanel(
radioButtons("rd",
label="Select time range for training dataset",
choices=list("23 month","18 month","12 month","6 month"),
selected="23 months"),
uiOutput("Box1"),
uiOutput("Box2")
),
mainPanel("Display results",
tableOutput("view"))
)
))
server.R
library(shiny)
biz = data.frame(
Sector = c("a", "a", "a", "a", "b", "b", "b", "b", "b", "b", "b", "b"),
Stock = c("Infy","TCS","Wipro","TechM","SBIN","ICICI","HDFC", "Axis", "IDBI", "PSB","BOI","Bob"),
stringsAsFactors = FALSE
)
shinyServer(function(input, output) {
output$Box1 = renderUI(selectInput("sector","select a sector",c(unique(biz$Sector),"pick one"),"pick one"))
output$Box2 = renderUI(
if (is.null(input$sector) || input$sector == "pick one"){return()
}else selectInput("stock",
"Select a stock",
c(unique(biz$Stock[which(biz$Sector == input$sector)]),"pick one"),
"pick one")
)
subdata1 = reactive(biz[which(biz$Sector == input$sector),])
subdata2 = reactive(subdata1()[which(subdata1()$Stock == input$stock),])
output$view = renderTable({
if(is.null(input$sector) || is.null(input$stock)){return()
} else if (input$sector == "pick one" || input$stock == "pick one"){return()
} else return(subdata2())
})
})