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author Antonio Pino Robles <data.script93@gmail.com>
date Fri, 29 May 2015 09:48:36 +0200
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8f23314345f4 Create local repository for matrix toolboxes. Step #0 done.
Antonio Pino Robles <data.script93@gmail.com>
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1 function A = dingdong(n)
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2 %DINGDONG Dingdong matrix - a symmetric Hankel matrix.
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Antonio Pino Robles <data.script93@gmail.com>
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3 % A = DINGDONG(N) is the symmetric N-by-N Hankel matrix with
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Antonio Pino Robles <data.script93@gmail.com>
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4 % A(i,j) = 0.5/(N-i-j+1.5).
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Antonio Pino Robles <data.script93@gmail.com>
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5 % The eigenvalues of A cluster around PI/2 and -PI/2.
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8f23314345f4 Create local repository for matrix toolboxes. Step #0 done.
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7 % Invented by F.N. Ris.
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8 %
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9 % Reference:
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10 % J.C. Nash, Compact Numerical Methods for Computers: Linear
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11 % Algebra and Function Minimisation, second edition, Adam Hilger,
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12 % Bristol, 1990 (Appendix 1).
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14 p= -2*(1:n) + (n+1.5);
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15 A = cauchy(p);