我在閃亮的應用程序中有一個看起來很小但棘手的問題,具有反應功能。閃亮:renderUI反應的問題
該應用旨在顯示選擇公司時的lineChart,並在選擇「全部」時顯示所有公司的條形圖。例如,在選擇時:
按類別1 = 3篩選和按類別1:2篩選,只剩下4家企業下降,然後我希望能夠在企業中選擇企業A下來得到公司A的折線圖。
問題是,當我選擇公司A時,它顯示公司A的lineChart 1秒,然後跳回到「全部」。
我認爲這個問題在於以下行:
output$firm <- renderUI({
selectInput("firm", "Filter by Firm:",
choices = c("All",as.character(unique(subset_data()$FIRM))))
})
我要求的選擇是「所有」和「公司X」。它首先爲公司X創建lineChart,然後在「All」下創建圖表。因此,我試圖從選項中刪除「全部」,但這並不奏效。
任何幫助非常感謝! 感謝
這裏有一個重複的例子:
首先創建示例數據:
set.seed(1)
df <- data.frame(FIRM=rep(LETTERS[1:7],each=10), CATEG_1=rbinom(70,4,0.9),CATEG_2=rbinom(70,1,0.2),date=as.Date("2014-01-01")+1:10,y1=sample(1:100,70))
ShinyApp:
library(shiny)
library(rCharts)
library(doBy)
library(plyr)
shinyApp(ui =
shinyUI(pageWithSidebar(
# Application title
headerPanel("Example"),
sidebarPanel(
uiOutput("firm"),
# selectInput("firm", "Filter by firm:",
# choices = unique(as.character(df))),
selectInput("categ_1", "Filter by Category 1:",
choices = c("All",unique(as.character(df$CATEG_1)))),
selectInput("date", "Filter by Date:",
choices = c("All","Last 28 Days","Last Quarter")),
selectInput("categ_2", "Filter by Category 2:",
choices = c("All",unique(as.character(df$CATEG_2))))
), #sidebarPanel
mainPanel(
h4("Example plot",style = "color:grey"),
showOutput("plot", "nvd3")
) # mainPanel
) #sidebarLayout
) #shinyU
,
server = shinyServer(function(input, output, session) {
subset_data <- reactive({df <- filter_data(df,input$firm,
input$date,
input$categ_1,
input$categ_2)
shiny::validate(need(!is.null(df),"No data to display"))
return(df)})
output$firm <- renderUI({
selectInput("firm", "Filter by Firm:",
choices = c("All",as.character(unique(subset_data()$FIRM))))
})
output$plot<-renderChart2({ build_plot(subset_data()) })
##############
#below are the functions used in the code
##############
# function for date subsetting
filter_date<-function(df,dateRange="All"){
filt <- df
td <- max(as.Date(filt$date))
if (dateRange=='Last 28 Days'){filt <-filt[filt$date>=(td-28),]}
if (dateRange=='Last Quarter'){filt <-filt[filt$date>=(td-84),]}
return(filt)
} # filter by date
# function for data subsetting
filter_data<-function(df,firm=NULL,dateRange="All",categ_1=NULL,categ_2=NULL)
{
filt<-filter_date(df,dateRange)
if (!is.null(firm)) {
if(firm!='All') {filt <- filt[filt$FIRM==firm,]}
}
if (!is.null(categ_1)){
if (categ_1!='All') {filt <- filt[filt$CATEG_1==categ_1,]}
}
if (!is.null(categ_2)) {
if (categ_2!='All') {filt <- filt[filt$CATEG_2==categ_2,]}
}
if(nrow(filt)==0) {filt <- NULL}
return(filt)
} # prepare data to be plotted
# function to create plot
build_plot <- function(df) {
plotData<-df
# If 1 partner selected, time series is shown
if (length(as.character(unique(plotData$FIRM)))==1) {
tabledta<-summaryBy(y1~FIRM+date,data=plotData,FUN=sum,keep.names=TRUE)
filler = expand.grid(FIRM=as.character(unique(df$FIRM)),
date=seq(min(tabledta$date),max(tabledta$date),by='1 day'))
df = merge(filler,
tabledta,
by=c('date','FIRM'),
all.x=T)
df[is.na(df)]=0
p <- nPlot(y1 ~ date, group = 'FIRM', data = df, type = 'lineChart')
p$chart(margin=list(left=150))
p$yAxis(showMaxMin = FALSE)
p$xAxis(tickFormat ="#!function(d) {return d3.time.format('%Y-%m-%d')(new Date(d * 24 * 60 * 60 * 1000));}!#")
p
}
# If "All" partners are selected, barchart of Top 5 is shown
else{
SummaryTab<-aggregate(y1~FIRM,data=plotData,FUN=sum)
SummaryTab$rank=rank(SummaryTab$y1)
SummaryTab$rank[SummaryTab$rank>5]<-6
if (length(SummaryTab$rank)>5) {
#Top 5 partners in terms of y1 are shown
top5<-SummaryTab[SummaryTab$rank<=5,]
# other partners are collapsed, shown as 1 entry
others<-aggregate(y1~rank,data=SummaryTab,FUN=sum)
others<-others[others$rank==6,]
others$FIRM<-"Others"
# Create the summarytable to be plotted
plotData=rbind(top5,others)}
tabledta<-summaryBy(y1~FIRM,data=plotData,FUN=sum,keep.names=TRUE)
tabledta<-arrange(tabledta,y1)
# if(is.null(tabledta)) {print("Input is an empty string")}
p <- nPlot(y1 ~ FIRM,data = tabledta, type = 'multiBarHorizontalChart')
p$chart(margin=list(left=150))
p$yAxis(showMaxMin = FALSE)
p
}
}
}) #shinyServer
)
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