ShinyApp Pitch for “Basic Introduction to ggplot2”

author: Marlen Doskarin using R version 3.6.2 (2019-12-12) and knitr version 1.28 date: Апрель 08, 2020 transition: rotate incremental: true

Why is the ShinyApp “Basic Introduction to ggplot2” needed? ========================================================

    - Non-intuitive syntax of `ggplot` R commands

• Basic capabilities of ggplot not widely known
• Options such as colour and facet_wrap mysterious to many

Who needs this ShinyApp? ========================================================

    - Anyone who wants to start using `ggplot` but was hesitant to make the leap

• Anyone teaching others how to use ggplot who needs a handy interactive example
• Anyone interested to see power and flexibility of ggplot
• Anyone wishing to observe power of the eval command

ggplot_command = sprintf("g = ggplot(mpg, aes(x=%s, y=%s, colour=%s)) + facet_wrap(~%s) + geom_%s()",
                         input$x, input$y, input$colour, input$facet_wrap, input$geom)
eval(parse(text=ggplot_command))

Example Command and Plot Generated by the ShinyApp “Basic Introduction to ggplot2”

    ```
    ## Loading required package: ggplot2
    ```
    
    ```
    ## Warning: package 'ggplot2' was built under R version 3.6.3
    ```

g = ggplot(mpg, aes(x=cyl, y=hwy, colour=class)) + facet_wrap(~drv) + geom_point()

    ========================================================
    

• Deployed at https://doskarin.shinyapps.io/Cars/