%%
% Let's define a set of 6 nodes (i.e., n=5 in our formulas). 
t = [0 0.075 0.25 0.55 0.7 1]';
n = length(t) - 1;

%%
% We plot the hat functions H_0,..,H_5  
for k = 0:n
    hfun = @(x) hatfun(x, t, k);
    fplot(hfun, [0 1])
    hold on
end
xlabel('x') 
ylabel('H_k(x)') 
title('Hat functions')
grid on