%%% animation.m: to run this script, at the matlab prompt type
%%% animation
%%%
%%% contains a Matlab animation example 

% define the x-axis grid
x = -30:30;

% define the axes dimensions and preserve them
v = [-30,30,0,0.3];
hold off;

% define number of frames and create frames
M = moviein(20);
for i = 1:20,
	for j = 1:61,
		u(j) = exp(-x(j)^2/(4*pi*i))/(sqrt(4*pi*i));
	end
	plot(x,u,'g');
	axis(v);
	if i == 1
		v = axis;
	end
	M(:,i) = getframe;

end

% run animation
movie(M,4,20)