R Data Structures and Algorithms

Exercises

1. Can you think of ways in which we can extract a few attributes (columns) and observations (rows) based on a certain condition?
   • Dataset - El Nino dataset from UCI KDD (https://kdd.ics.uci.edu/databases/el_nino/el_nino.html)
   • Filter for latitude and longitude with humidity > 88% and air temperature < 25.5 degree Celsius
   • 10,000 iterations for evaluating each expression
2. Can we add multiple arguments within a function in the apply family? If yes, what is the syntax for assigning multiple arguments?
3. A general notion states that for loops are slower than the apply functions. Is it true or false? If false, what are the conditions in which the notion gets negated?
4. Define ADT for calculating the area of any geometrical object, such as a circle, square, ...