Although much data analysis in R can be carried out in an interactive manner using command prompt, often for more complex tasks, one needs to write R scripts. As mentioned in the introduction, R has both the perspective of a functional and object-oriented programming language. In this section, some of the standard syntaxes of the programming in R are described.
Control structures are meant for controlling the flow of execution of a program. The standard control structures are as follows:
else: To test a condition
for: To loop over a set of statements for a fixed number of times
while: To loop over a set of statements while a condition is true
repeat: To execute an infinite loop
break: To break the execution ...