There is a wealth of information available about using most m-file environments. In fact, the amount of information may overwhelm someone who is beginning.
The help command can be used to get information about a specific command or function. For example, typing help cos at the command prompt will give information about the cosine function. Typing help will give general information.
A significant amount of information is available on the World Wide Web:
MATLAB: Useful information is available at the MATLAB Helpdesk page (http://www.mathworks.com/access/helpdesk/help/helpdesk.html), including reference material for MATLAB's functions (http://www.mathworks.com/access/helpdesk/help/techdoc/ref/ref.html).LabVIEW MathScript: Useful information is available at the National Instruments LabVIEW MathScript Portal (http://zone.ni.com/devzone/conceptd.nsf/webmain/255092BA939E491686257090006794D0?opendocument&node=13106_US), including an interactive demonstration of MathScript (http://www.ni.com/swf/demos/us/labview/mscriptwindow/default.htm).Octave: The definitive source for information is The official GNU Octave Manual (http://www.gnu.org/software/octave/doc/interpreter/index.html#Top). Also, one of many good tutorials is available (http://www.aims.ac.za/resources/tutorials/octave/).