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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1670/CH4/EX4.5 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '1670/CH4/EX4.5')
| -rwxr-xr-x | 1670/CH4/EX4.5/4_5.sce | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/1670/CH4/EX4.5/4_5.sce b/1670/CH4/EX4.5/4_5.sce new file mode 100755 index 000000000..34a049b36 --- /dev/null +++ b/1670/CH4/EX4.5/4_5.sce @@ -0,0 +1,37 @@ +//Example 4.5
+//Jacobi Method
+//Page no. 95
+clc;close;clear;
+
+A=[10,7,8,7;7,5,6,5;8,6,10,9;7,5,9,10];
+n=4;
+for k=1:14
+ max1=0
+for i=1:n
+ for j=1:n
+ if A(i,j)>max1 & i~=j then
+ max1=A(i,j)
+ i1=i;j1=j;
+ end
+ end
+end
+fi=(atan((2*A(i1,j1))/(A(i1,i1)-A(j1,j1)+10^-20)))/2
+disp(fi,'fi = ')
+O1=eye(n,n)
+O1(i1,j1)=-sin(fi)
+O1(j1,i1)=sin(fi)
+O1(i1,i1)=cos(fi)
+O1(j1,j1)=cos(fi)
+disp(O1,'O1 = ')
+A=inv(O1)*A*O1
+disp(A,'A1 = ')
+end
+printf('\n\n The eigenvalues are : \n\n')
+for i=1:n
+ printf('\tl%i = %g\t',i,A(i,i))
+end
+printf('\n\n')
+l=poly(0,'lb')
+A=A-l*eye(n,n)
+disp(det(A),'Characteristic Equation = ')
+printf("\n\n\n\n\nNote : Computation Errors in some parts in calculation performed in book")
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