when you need help in R ?

    when you use  R and you need help such as you need to know about the mean of word. you can

  

        

         R has an inbuilt help facility similar to the man facility of UNIX. To get more information on any specific named function, for example solve, the command is 

  

         > help(solve)

         or

        > ?solve

         For a feature specified by special characters, the argument must be enclosed in double or single quotes, making it a “character string”: This is also necessary for a few words with syntactic meaning including if, for and function.

> help("[[")

Either form of quote mark may be used to escape the other, as in the string "It's important". Our convention is to use double quote marks for preference.

On most R installations help is available in HTML format by running

> help.start()

The help.search command allows searching for help in various ways. For example,

> ??solve

The examples on a help topic can normally be run by

> example(topic)

Windows versions of R have other optional help systems: use

> ?help