Diamond Features and price (Shiny App)

We will be using diamonds dataset in R for this assignment. Use ?diamonds to get info on the dataset. The focus will be on the shiny apps controls for this assigment.

R Studio's Shiny Apps is used used to create this application. It is deployed on Shinyapps.io the link for which is in this presentation.

Below is a overview of the diamonds dataset.

library(ggplot2)
str(diamonds)

Classes 'tbl_df', 'tbl' and 'data.frame':   53940 obs. of  10 variables:
 $ carat  : num  0.23 0.21 0.23 0.29 0.31 0.24 0.24 0.26 0.22 0.23 ...
 $ cut    : Ord.factor w/ 5 levels "Fair"<"Good"<..: 5 4 2 4 2 3 3 3 1 3 ...
 $ color  : Ord.factor w/ 7 levels "D"<"E"<"F"<"G"<..: 2 2 2 6 7 7 6 5 2 5 ...
 $ clarity: Ord.factor w/ 8 levels "I1"<"SI2"<"SI1"<..: 2 3 5 4 2 6 7 3 4 5 ...
 $ depth  : num  61.5 59.8 56.9 62.4 63.3 62.8 62.3 61.9 65.1 59.4 ...
 $ table  : num  55 61 65 58 58 57 57 55 61 61 ...
 $ price  : int  326 326 327 334 335 336 336 337 337 338 ...
 $ x      : num  3.95 3.89 4.05 4.2 4.34 3.94 3.95 4.07 3.87 4 ...
 $ y      : num  3.98 3.84 4.07 4.23 4.35 3.96 3.98 4.11 3.78 4.05 ...
 $ z      : num  2.43 2.31 2.31 2.63 2.75 2.48 2.47 2.53 2.49 2.39 ...

table(diamonds$color)

    D     E     F     G     H     I     J 
 6775  9797  9542 11292  8304  5422  2808 

table(diamonds$clarity)

   I1   SI2   SI1   VS2   VS1  VVS2  VVS1    IF 
  741  9194 13065 12258  8171  5066  3655  1790 

Let's take a look a the application which will help us undertand the usage described in the next slide.

The Diamond Features and Price application has following input variables:

• Carats: Where you can specify the range of carat size.
• Price: Where you can specify the range of price of the diamonds (in $).
• Colors: You can select different types of colors. This is a radio button. Select any one.
• Calrity: The sever fetches the clarity values from the dataset and shows it as a dropdown. Select any one.

As the values change, the Price Vs Carat graph changes. The data is filtered based on your selection criteria. Different lines are showed for different types of Diamond Cuts.

Note: Sometimes you may not see any changes when you change the values that is due to no values existing for that criteria.

How to access this application?

The application is hosted on Shinyapps.io . Use the following link to access the application: https://demo-shiny-apps.shinyapps.io/diamond_shiny_app/

The Code is available on GitHub in UI and Server code is available on Github in app.R file. https://github.com/RalstonFonseca/Shiny-Apps