% Problems with computer projectors turned this
% lecture into an exercise session.
% We illustrated the use of functions in functions
% with the Trapezoidal Rule, implemented by the
% function traprule:
help traprule % see comments

 
   The function t = traprule(f,a,b)
     returns in t the application of the Trapezoidal Rule
     to approximate the definite integral of f over [a,b].
 
   Example: 
     t = traprule('sin',0,1) % integral of sin(x) over [0,1]
 

t = traprule('sin',0,1) % use it

t =

    0.4207

diary off