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chebyshev differentiation matrices codes not callable

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Lukgaf
Lukgaf 2018-3-19
关闭： Walter Roberson 2018-3-19
% check the base case
if N == 0; D = 0; x = 1; return; end
% create the Chebyshev grid
x = cos(pi*(0:N)/N)';
c = [2; ones(N-1,1);2].*(-1).^(0:N)';
X = repmat(x,1,N+1);
dX = X-X';
D = (c*(1./c)')./(dX+(eye(N+1)));
D = D - diag(sum(D'));
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Walter Roberson
Walter Roberson 2018-3-19
Duplicated by the later https://www.mathworks.com/matlabcentral/answers/389165-chebyshev-differential-matrices-code-not-callable which appears to be more complete

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