Functions

• NOT built-in functions. User-defined functions.
• An efficient way to construct programs is to use user-defined functions, saved as m-files.
• These programs allow the user to specify the input and output parameters.
• They are easily called as subroutines in other programs.
• Construct an m-file in the m-file Editor/Debugger (by selecting New under File menu).
• Example: Place the function $f(x) = 1 + x - x^2/4$ in the m-file fun.m.
  • In the Editor/Debugger:
    *************Write into m-file****************
    

    
    
    *********************************************
  • Once this function is saved as an m-file named fun.m, try the following commands;

    
• Functions can be defined recursively!
• Follow the above procedure for the function below and save under the name of fact.m,

  

  >>fact(333)