我有以下代码,我尝试运行失败。我只是希望能够根据输入范围过滤图形输出。在这个例子中,如果范围输入设置为1-5,我希望在图表上看到5个点,同样2-5的范围输入显示4个点。
##UI
require(shiny)
shinyUI(fluidPage(
titlePanel(title=h4("Races", align="center")
),
sidebarPanel(
sliderInput("num", "Number:",
min = 0, max = 5,step=1,value=c(0,2)),
mainPanel(
plotOutput("plot2")))))
##server
library(dplyr)
library(ggplot2)
shinyServer(function(input,output){
num<-c(1,2,3,4,5)
let<-c("A","B","C","D","E")
date<-c("2015-5-1","2015-6-1","2015-7-1","2015-8-1","2015-9-1")
df<-data.frame(num,let,date)
dat<-reactive({
df %>% filter(num==input$num)})
output$plot2<-renderPlot({
ggplot(dat(),aes(x=date,y=num))+geom_point(colour='red')},height = 400,
width = 600)})
我想根据输入范围显示图表上的值范围,但只显示1个值,而不是具有相应日期的值范围。
提前致谢。
答案 0 :(得分:9)
#rm(list = ls())
library(shiny)
library(ggplot2)
num<-c(1,2,3,4,5)
let<-c("A","B","C","D","E")
date<-c("2015-5-1","2015-6-1","2015-7-1","2015-8-1","2015-9-1")
df <- data.frame(num,let,date)
ui <- fluidPage(
titlePanel(title=h4("Races", align="center")),
sidebarPanel(
sliderInput("num", "Number:",min = 0, max = 5,step=1,value=c(1,2))),
mainPanel(plotOutput("plot2")))
server <- function(input,output){
dat <- reactive({
test <- df[df$num %in% seq(from=min(input$num),to=max(input$num),by=1),]
print(test)
test
})
output$plot2<-renderPlot({
ggplot(dat(),aes(x=date,y=num))+geom_point(colour='red')},height = 400,width = 600)}
shinyApp(ui, server)