Alien sightings: add inputs

The National UFO Reporting Center (NUFORC) has collected sightings data throughout the last century. This app is going to allow users to select a U.S. state and a time period in which the sightings occurred.

Remember that when they're added, the inputs should look as they do here, though they won't yet be in the sidebar:

An app displaying a bar graph of UFO sightings by state and dates

The usa_ufo_sightings dataset, plus the shiny, ggplot2, and dplyr packages have all been loaded for you.

แบบฝึกหัดนี้เป็นส่วนหนึ่งของหลักสูตร

Building Web Applications with Shiny in R

ดูคอร์ส

คำแนะนำการฝึกหัด

Add a title to your app.
Add an input to the sidebar that allows users to select one of the 50 U.S. states.
Add an input to the sidebar that allows users to select a range of dates. Feel free to use any start or end dates you'd like.

แบบฝึกหัดเชิงโต้ตอบแบบลงมือทำ

ลองทำแบบฝึกหัดนี้โดยเติมโค้ดตัวอย่างนี้ให้สมบูรณ์

ui <- fluidPage(
  # CODE BELOW: Add a title
  
  sidebarLayout(
    sidebarPanel(
      # CODE BELOW: One input to select a U.S. state
      # And one input to select a range of dates
      
      
      
      

    
    
    ),
  	mainPanel()
  )
)

server <- function(input, output) {

}

shinyApp(ui, server)

แก้ไขและรันโค้ด