This is the presentation for the final assignment of the Developing Data Products Course in R.

For this assingment, I prepared a simple shiny app that uses the built-in “mtcars” dataset and shows the gas mileage vs. cars hoursepower for different factors. The factors are discussed in the next page.

The dataset used is presented here:

##                    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

The parameters that are selectable in the appliation are number of cylinders, displacement and tranmission type.

The figure for the full dataset is plotted here:

• The size of markers represent the engine displacement
• This can be filtered via selecting engines with small, medium or large displacment.
• Displacements smaller than 160 are small, between 160 and 380 are medium and above that are large.