An interactive introduction to MATLAB

3.2functions 41

Functions are executed at the command prompt by typing their function
definition line without thefunctioncommand. Listing 3.3 demonstrates how
you would execute themotionfunction from Table 5.
Listing 3.3: Executing a function
1 >> [rho, H, F] = motion(x, y, t)

Comments:

• Input variablesx, y, tmust be defined in the workspace before you
  execute the function. This is because variables defined within a function
  file are local to the function, i.e. do not exist in the workspace.


• When you execute the function the names for the input and output
  variables do not have to match those used in the function file.