Here we show how to aggregate data in R and save it in excel.

This work is published for the fulfillment of peer reviewed assignment 2 on Cousera course on Reproducible research

In this example we demonstrate on how to add more derived features into a data frame by sub-setting relevant data chunks within a for-loop. This may also be achieve through use of regular expressions as per code that inspired this example on Mr. Ts'iliso Marata LinkedIn post.