About the Application

In this application we’ll be building uses the mtcars data from the R datasets package, and allows users to see a box-plot that explores the relationship between one variable of mtcars and other variables (Miles per gallon, Cylinders, Transmission, Displacement, Horsepower, and weight).

We want to provide a way to select which variable to plot against other variable as well as provide an option to include or exclude outliers from the plot. To do this we’ll add two elements to the sidebar, a selectInput to specify the variable and a checkboxInput to control display of outliers.

head(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

Here we can see all the variables that is present in the dataset… The application has few of them you can try for building the box plot

Here we can see the appliction as we open it… the default boxplot plotted is of miles per gallon v/s cylinder

Here we can see that plot of boxplot when done using R-code give the same box plot as shown in the previous slide…

boxplot(mpg~cyl, mtcars)