Programming in S
The S language is both an interactive language and a language for adding new functions to the S-PLUS system. It is a complete programming language with control structures, recursion and a useful variety of data types. The S-PLUS environment provides many functions to handle standard operations, but most users need occasionally to write new functions, a topic we discuss in detail in the companion volume. In this chapter we discuss language ideas that will be seen in system functions.
KeywordsGeneralize Inverse Dimension Vector Data Frame Character String Matrix Operation
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