This presentation is created as part of the requirement for the Coursera Developing Data Products Course. Objectives of the assignment are to ensure sound understanding of the following concepts.

• Use shiny to build data product application
• Use R-Presentation to create data product related presentations

Enables the user to download table data in shiny - CSV, TXT, DOC formats

• Using downloadButton & donwloadHandler functions.

The following 5 datasets are available for download:

• iris dataset, mtcars dataset, faithful dataset, trees dataset, faithful dataset.
  
• The source code consists of two files: server.R and ui.R
• The application is hosted on Rstudio's shiny server in the cloud (Shinyapps.io)

library(shiny)

# Define UI for data download app ----
fluidPage(
  
  # App title ----
  titlePanel("Downloading Data using downloadbutton() and downloadHandler()"),
  
  # Sidebar layout with input and output definitions ----
  sidebarLayout(
    
    # Sidebar panel for inputs ----
    sidebarPanel(
      
      # Input: Choose dataset ----
      selectInput("dataset", "Choose a dataset:",
                  choices = c("mtcars", "pressure", "iris", 
                              "faithful","trees")),
      br(),
      helpText("Select the download format"),
      radioButtons("type", "Format type:",
                   choices = c("Excel (CSV)", "Text(TSV)", "Text (Space Seperated)", 
                               "Doc")),
      br(),
      helpText("Click on the download button download the dataset observation"),
      
      # Button
      downloadButton('downloadData', 'Download')
      
    ),
    
    # Main panel for displaying outputs ----
    mainPanel(
      
      tableOutput('table')
      
    )
    
  )
)

The application pitched by this presentation is located at my Shiny app page

The source codes for ui.R and server.R files are also available on the GitHub repo