close all; clc; clear; 

randn('seed',0); rand('seed',0);

% Problem EPage 46
% 

r = 3:2:21;
A = sprandsym(10,0.2,r);

tic; chol(A); t_sparse = toc;

tic; chol(full(A)); t_full = toc;

disp( sprintf( 'time sparse= %10.6f, time full= %10.6f', t_sparse, t_full ) );