Developing Data Product

Question 1

what is r markdown

Answer 1

A format that can be interpreted into markdown (which is a simplified markup language).

A simplified format that, when interpreted, incorporates your R analysis into your document.

Question 2

In rmarkdown presentations, in the options for code chunks, what command prevents the code from being repeated before results in the final interpreted document?

Answer 2

echo = FALSE

Question 3

In rmarkdown presentations, in the options for code chunks, what prevents the code from being interpreted?

Answer 3

eval = FALSE

Question 4

What is leaflet?

Answer 4

An R package interface to the javascript library of the same name

A javascript library for creating interactive maps

Question 5

If I want to add popup icons to my leaflet map in R, I should use.

Answer 5

addMarkers

Question 6

Which of the following are absolutely necessary for creating a functioning shiny app? (Check all that apply)

Answer 6

A server.R file containing a call to shinyServer()

A ui.R file containing a call to shinyUI()

Question 7

What is incorrect about the following syntax in ui.R?

library(shiny)
shinyUI(pageWithSidebar(  
  headerPanel("Data science FTW!"),  
  sidebarPanel(    
     h2('Big text')    
     h3('Sidebar')  
  ),  
  mainPanel(      
       h3('Main Panel text')  
  )
))

Answer 7

Missing a comma in the sidebar panel

Question 8

Why isn’t it doing what we want?

Answer 8

The server.R output name isn’t the same as the plotOutput command used in ui.R.

Question 9

What are the main differences between creating a Shiny Gadget and creating a regular Shiny App? (Check all that apply)

Answer 9

Shiny Gadgets are designed to be used by R users in the middle of a data analysis.

Shiny Gadgets are designed to have small user interfaces that fit on one page.