It is sometimes useful to access your own C or Fortran programs using shell
escape functions. Shell escape functions use the shell escape command
! to make external stand-alone programs act like new MATLAB® functions.
For example, the following function, garfield.m, uses an external
function, gareqn, to find the solution to Garfield's equation.
function y = garfield(a,b,q,r) save gardata a b q r !gareqn load gardata
This function:
Saves the input arguments a,
b, q, and r to a
MAT-file in the workspace using the save command.
Uses the shell escape operator to access a C or Fortran
program called gareqn that uses the workspace variables to
perform its computation. gareqn writes its results to the
gardata MAT-file.
Loads the gardata MAT-file to obtain
the results.