Passing a function as parameter

[Luca Manini]

Hi, 

is it possible to pass functions to other fucntions?
The simple example is to write a function that calculate the 
mean (or the definite integral) of that function on a given interval.

in Python is like this:

def foo(x):
    return x * x

def mean(f, a, b):
    return (f(a) + f(b))/2.0

print mean(foo, 5, 0)

in Octave "should" be something like:

function y = foo(x)
  y = x * x;
endfunction

function y = mean(f, a, b)
  y = (f(a) + f(b))/2.0;
endfunction

mean (foo, 5, 0)

or 

mean ('foo', 5, 0)

but it does not work. 


        Any hint? TIA, Luca.
        Please answer (also) directly to address@hidden



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