Matrix Generator GEAR | |
---|---|
Source: | C. W. Gear |
Discipline: | numerical linear algebra |
Language: | Java applet |
Output format: | Matrix Market format |
This is a Java applet which generates an N-by-N matrix with ones on the sub- and super-diagonals, +1 or -1 in the (1,J) position, +1 or -1 in the (N,N+1-K) position, and zeros everywhere else.
All eigenvalues are of the form 2*COS(a) and the eigenvectors are of the form [SIN(w+a), SIN(w+2a), ..., SIN(w+Na)]. A can have double and triple eigenvalues and can be defective. The applet will compute the eigenvalues and eigenvectors on demand.
The diagonal is zero. The matrix is singular if J=K=N.
This generator was developed by Bruce Miller of NIST based on Nick Higham's Test Matrix Toolbox for MATLAB.
Parameters:
N | order of the matrix. |
J | offset (from left) of extra nonzero in first row |
A(1,J) | +1 or -1 |
K | offset (from right) of extra nonzero in last row |
A(N,N+1-K) | +1 or -1 |
[ Home ] [ Search ] [ Browse ] [ Resources ]
Last change in this page: Wed Sep 22 13:34:21 US/Eastern 2004 [Comments: ]