Primary M-File Functions
The first function in any M-file is called the primary function. Following the primary function
can be any number of subfunctions, which can serve as subroutines
to the primary function.
Under most circumstances, the primary function is the only function
in an M-file that you can call from the MATLAB command line or
from another M-file function. You invoke this function using the name
of the M-file in which it is defined.
For example, the average function shown here
resides in the file average.m:
function y = average(x)
% AVERAGE Mean of vector elements.
y = sum(x)/length(x); % Actual computation
You can invoke this function from the MATLAB command line
with this command to find the average of three numbers:
average([12 60 42])
Note that it is customary to give the primary function the same
name as the M-file in which it resides. If the function name differs
from the filename, then you must use the filename to invoke the function.
 | Anonymous Functions | | Nested Functions |  |
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