Subscripting

For objects that contain more than one element (vectors, matrices, arrays, data frames, and lists), subscripting is used to access some or all of those elements. Besides the usual numeric subscripts, R allows the use of character or logical values for subscripting. Subscripting operations are very fast and efficient, and are often the most powerful tool for accessing and manipulating data in R. The next subsections describe the different type of subscripts supported by R, and later sections will address the issues of using subscripts for particular data types.