Matlab 共轭梯度法求解任意线性方程组!function x = cg(A,b)tol=1e-10;r = b + A*b;w = -r;z = A*w;s = w'*z;t = (r'*w)/s;x = -b + t*w;for k = 1:numel(b);r = r - t*z;if( norm(r) < tol )return;endB = (r'*z)/s;w = -r + B*w;z = A*w;s = w'*z;t = (
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