% Matlab diary from cs110a class #11, Jan 28 2005.
%
% This is what I typed in class.  
%
% Type it into Matlab yourself to
% reproduce the output I showed.

load ucsbweb
U{1}
U{2:5}
whos
G
U{1}
U{3}
load ucsbweb2
whos
U
spy(G)
rs = sum(G');
size(rs)
max(rs)
[val, ind] = max(rs)
U{3}
a = rand(3)
sum(a)
sum(a')
b
b(3)=5
U{3}
U(3)
isstr(U{3})
isstr(U(3))
V = U(3)
V{1}
clc
whos
e = ones(5,1)
e * e'
ones(5,5)
x = rand(5,1)
sum(x)
e' * x
e'
x
clc
help pagerank
xncm = pagerank(U,G);
size(xncm)
sum(xncm)
clc
whos
clc
c = sum(G);
size(c)
c(3)
D = diag( 1./c);
f = find(c==0)
G(:,f) = 1;
c = sum(G);
find(c==0)
D = diag(sparse(1./c));
spy(D)
n=1000;
I = speye(n);
e = ones(n,1);
p = .85;
delta = (1-p)/n
x = (I - p*G*D) \ (delta*e);
x = A \ b;
sum(x)