plotting a filled curve

A search on how to fill the area under a curve reveals that such questions are quite often asked. Here is the solution in a function file that I created for simplifying filled curve plots using matlabs fill function. function handle = filledcurve(x, y, zero, colorspec)   if (nargin < 3) zero = 0; end   if (nargin < 4) colorspec = 'b'; end     xtemp = [x(1) ;...