power method e pagerank come funzioni esterne

functions/power_method.m

@@ -0,0 +1,24 @@
+
+
+function [v,a] = power_method (U,toll)
+
+[x,~] = size(U);
+for i=1:x
+    v(i)=1;
+end
+v=v';
+
+err = inf;
+while err > toll
+    
+    v1=U*v;
+    v1=v1./norm(v1,inf);
+    err = norm(v1-v,inf);
+    a = v1./v;
+    v=v1;
+    
+end
+
+
+ 
+end