App 3: Popular Baby Names Redux
Great! Hope you enjoyed building that app displaying popular baby names as a column plot. Let us wrap this chapter up by enhancing the app we built earlier by adding a table showing the top 10 baby names as a tab. Your final app should visually resemble the screenshot below.
Note that we have provided a function get_top_names() to extract
the top 10 names for a given year and sex. You can get the top 10 male names
for the year 2000 using get_top_names(2000, "M").
本练习是课程的一部分
Building Web Applications with Shiny in R
练习说明
- The code provided is for the app you built in the previous exercise. Modify this code to add an output to the server to display a table of popular names.
- Lay out the plot and table outputs in the UI as tabs.
交互式实操练习
通过完成这段示例代码来试试这个练习。
# MODIFY this app (built in the previous exercise)
ui <- fluidPage(
titlePanel("Most Popular Names"),
sidebarLayout(
sidebarPanel(
selectInput('sex', 'Select Sex', c("M", "F")),
sliderInput('year', 'Select Year', min = 1880, max = 2017, value = 1900)
),
mainPanel(
plotOutput('plot')
)
)
)
server <- function(input, output, session) {
output$plot <- renderPlot({
top_names_by_sex_year <- get_top_names(input$year, input$sex)
ggplot(top_names_by_sex_year, aes(x = name, y = prop)) +
geom_col()
})
}
shinyApp(ui = ui, server = server)