From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 845/CH3/EX3.9/Ex3_9.sce | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 845/CH3/EX3.9/Ex3_9.sce

(limited to '845/CH3/EX3.9')

diff --git a/845/CH3/EX3.9/Ex3_9.sce b/845/CH3/EX3.9/Ex3_9.sce
new file mode 100755
index 000000000..c2cb113dd
--- /dev/null
+++ b/845/CH3/EX3.9/Ex3_9.sce
@@ -0,0 +1,26 @@
+//Example 3.9
+clc
+clear
+
+A = [1 1 1; 4 3 -1; 3 5 3];
+n = length (A(1,:));
+Aug = [A,eye(n,n)];
+
+// Forward Elimination
+for j = 1:n-1
+    for i = j+1:n
+        Aug(i,j:2*n) = Aug(i,j:2*n) - Aug(i,j) / Aug(j,j) * Aug(j,j:2*n);
+    end
+end
+
+// Backward Elimination
+for j = n:-1:2
+    Aug(1:j-1,:) = Aug(1:j-1,:) - Aug(1:j-1,j) / Aug(j,j) * Aug(j,:);
+end
+
+// Diagonal Normalization
+for j=1:n
+    Aug(j,:) = Aug(j,:) / Aug(j,j);
+end
+Inv_A = Aug(:,n+1:2*n);
+disp(Inv_A,"Inverse of A (A-1) = ")
-- 
cgit