Exercise

checkboxInput and checkboxGroupInput

You will now try another example involving checkbox inputs. As mentioned in the video, this can be done using checkboxInput() if you only need a single checkbox, and checkboxGroupInput() if you need multiple checkboxes.

In your shinyApp, you may also want users to be able to select types of days of the week, since people may have different sleeping habits depending on the day of the week. You may, for example, tend to sleep a tad later if you don't have school or work the next day.

In this exercise, you will allow users to select one of the following options:

  1. "All days"
  2. "Nonholiday weekdays"
  3. "Weekend days and holidays"

The shiny library has already been loaded for you here.

Instructions 1/2

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  • Add checkboxInput() to the UI.
  • Set its name to "Display year" and set its initial value to TRUE so that the checkbox is pre-selected.