?? sgrhs.m
字號:
function dw = sgrhs(t,w,flag,D)% The function dw = sgrhs(t,w,flag,D) computes the right-hand side% of the sine-Gordon system with the aid of an NxN differentiation matrix D.% The input parameter flag is set by the ODE solver.% J.A.C. Weideman, S.C. Reddy 1998 N = length(w)/2; u = w(1:N); v = w(N+1:2*N);du = v;dv = D*u-sin(u);dw = [du; dv];
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