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- function A = gallery(n)
- %GALLERY A couple of small test matrices.
- % GALLERY(3) is a badly conditioned 3-by-3 matrix.
- % GALLERY(5) is an interesting eigenvalue problem. Try to find
- % its EXACT eigenvalues and eigenvectors.
- %
- % See also MAGIC, HILB, INVHILB, HADAMARD, ROSSER, WILKINSON.
-
- % C. Moler, 4-30-87.
- % Copyright (c) 1984-93 by The MathWorks, Inc.
-
- if n == 3
- A = [ -149 -50 -154
- 537 180 546
- -27 -9 -25 ];
-
- elseif n == 5
- A = [ -9 11 -21 63 -252
- 70 -69 141 -421 1684
- -575 575 -1149 3451 -13801
- 3891 -3891 7782 -23345 93365
- 1024 -1024 2048 -6144 24572 ];
-
- else
- A = [];
- end
-