This peer assessed assignment we use Rstudio Presenter to prepare a reproducible pitch presentation about our shiny application that uses mtCars Data. The app produces a plot of mpg agains other selected varriables. The code for shine based code files can be found this githud link https://github.com/diskava/developing-data-products-week-4/tree/master/mtcars The shiny app is hosted on https://diskava.shinyapps.io/mtcars/

##                    mpg cyl disp  hp drat    wt  qsec vs am gear carb
## Mazda RX4         21.0   6  160 110 3.90 2.620 16.46  0  1    4    4
## Mazda RX4 Wag     21.0   6  160 110 3.90 2.875 17.02  0  1    4    4
## Datsun 710        22.8   4  108  93 3.85 2.320 18.61  1  1    4    1
## Hornet 4 Drive    21.4   6  258 110 3.08 3.215 19.44  1  0    3    1
## Hornet Sportabout 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
## Valiant           18.1   6  225 105 2.76 3.460 20.22  1  0    3    1

shinyUI(fluidPage(
    
    # Application title
    titlePanel("The mtCars Data - Miles per Gallon vs Other Variables"),
    
    sidebarPanel(
        
        selectInput("variable", "Variable:", 
                    c("Horse Power"="hp",
                      "Cylinders" = "cyl",
                      "Displacement"="disp",
                      "Transmission" = "am",
                      "Gears" = "gear"))
    ),
    
    mainPanel(
        # Use header level 3 to format label
        h3(textOutput("caption")),
        
        # Show the plotted data
        plotOutput("mpgPlot")
    )
))

shinyServer(function(input, output) {
    
    formulaText <- reactive({
        paste("mpg vs ", input$variable)
    })
    
    output$caption <- renderText({
        formulaText()
    })
    output$mpgPlot <- renderPlot({
        ggplot(mtcars, aes_string(y=input$variable, x="mpg")) + geom_point()+ facet_wrap(~cyl)
    })
    
})