Show that the function list() may be used to combine several components to form a new list. Give an example. Write a code segment in R to extract the name of a component stored in another variable,...

Show that the function list() may be used to combine several components to form a new list. Give an example.

Write a code segment in R to extract the name of a component stored in another variable, giving an example.

With an example, use the concatenation function c() with given list arguments, obtain a list whose components are those of the argument list joined together sequentially, in the form of

Look up the software Epidata from its web site http://www.epidata.dk, and suggest an efficient method of data entry in R.