Data manipulation with R

Question 1

Modes of objects

Answer 1

numeric, character, and logical

Question 2

scan() the characters

Answer 2

scan(what=” “)

Notes: By default, scan expects all of its input to be numeric data; this can be overridden with the what= argument

Question 3

Example: scan will output a list with as many elements as there are data types provided

Answer 3

names = scan(what=list(a=0,b=”“,c=0))

Question 4

One possible drawback with read.table

Answer 4

Automatically convert character variables to factors. To remove this feature, use
options(stringsAsFactors = FALSE)