Anul 3 Semestrul 2

2025-07-03 20:56:38 +03:00
parent 184f3bd92e
commit 3b7fb85767
269 changed files with 20955 additions and 0 deletions
@@ -0,0 +1,39 @@
+#1.b
+
+
+nodes = linspace(-2,4,10);
+f=@(x)(x+1)./(3*x.^2+2*x+1);
+
+plot(nodes, f(nodes),'o');
+hold on
+
+
+x=linspace(-2,4,500);
+
+
+plot(x,f(x));
+hold on
+
+lnf=lagrange_classic(nodes,f(nodes),x);
+
+plot(x,lnf)
+
+plot(x,abs(f(x)-lnf),'x')
+
+
+nodes = [81,100,121];
+
+f_nodes = [9,10,11];
+
+sqrt(118);
+lnf = lagrange_classic(nodes,f_nodes, [118]);
+
+
+nodes = [1980,1990,2000,2010,2020];
+f_nodes = [4451,5287,6090,6970,7821];
+
+lnf = lagrange_barycentric(nodes, f_nodes, [2005,2015])
+
+abs([6474,7405] - lnf)
+
+