The command help, by
itself, lists all primary help topics. Each primary topic
corresponds to a directory name on the Matlab path.
>> help topic
gives help on the specified topic. The topic
can be a command name, a directory name, or a Matlab path relative
partial pathname. If it is a command name, help
displays information on that command. If it is a directory name,
help displays the Table-Of-Contents for the
>> helpwin topic
does the same as help but displays the help
text for the specified topic inside a desktop help window.
displays the start page of a comprehensive
hypertext documentation and troubleshooting in the Matlab Help