It is always a good idea to use examples to illustrate how useful or important it is to understand some closely related packages. The first example is extremely simple: generate a QR code for the CNN website. It has just two lines. Note that you need to run install.packages("qrcode") if the package is not preinstalled:
> library(qrcode)
> qrcode_gen("https://www.cnn.com")
The generated QR code is shown here. Users can use the QR scanner installed on their cell phone to go to the CNN website:
For the second example, we believe the best example for the researchers and users in the area of data science is an R package called rattle. If a user hasn't preinstalled the package, they can type the following line of R code:
>install.packages("rattle")
To launch the package, type the following two lines of R code...
