How to generate a symmetric Toeplitz matrix?

How to generate a symmetric Toeplitz matrix ?

Answer 1

[Stephan]

>> toeplitz([-pi 0 pi])

ans =

   -3.1416         0    3.1416
         0   -3.1416         0
    3.1416         0   -3.1416


>> toeplitz([-pi -pi/2 0 pi/2 pi])

ans =

   -3.1416   -1.5708         0    1.5708    3.1416
   -1.5708   -3.1416   -1.5708         0    1.5708
         0   -1.5708   -3.1416   -1.5708         0
    1.5708         0   -1.5708   -3.1416   -1.5708
    3.1416    1.5708         0   -1.5708   -3.1416

[Omar B.]

How can we make the size of the matrix 200 by 200?

[John D'Errico]

I don't think you read the help for toeplitz. When called with one vector argument, toeplitz ALWAYS generates a symmetric toeplitz matrix, based on the vector provided.

So if you want a 200x200 matrix, then pass it a vector of length 200.

[Stephan]

Use linspace:

vec = linspace(-pi,pi,200);
res = toeplitz(vec);

[Omar B.]

Thank you so much

[Stephan]

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