More exploration of the Gapminder data
To use the gapminder data in a Shiny app, you will often have to filter the dataset in order to retain only a subset of the rows. You can use the subset() function for that.
Latihan ini adalah bagian dari kursus
Case Studies: Building Web Applications with Shiny in R
Petunjuk latihan
You are given a Shiny app that contains an empty text output. Your task is to:
- Load the
gapminderpackage. - Determine the population of France in year 1972 using the
subset()function, and display that number in the text output (line 14).
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
# Load the gapminder package
___
# Define UI for the application
ui <- fluidPage(
"The population of France in 1972 was",
textOutput("answer")
)
# Define the server function
server <- function(input, output) {
output$answer <- renderText({
# Determine the population of France in year 1972
subset(___ & ___)$___
})
}
# Run the application
shinyApp(ui = ui, server = server)