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10 lines
267 B
10 lines
267 B
11 months ago
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function f=fun(x,y,z,a,b,c)
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% k=1e2;
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k=20;
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tmp = (c + cos(2*pi.*x) + a.*cos(2*pi.*y) + b.*cos(2*pi.*z));
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tmp2 = exp(k.*tmp);
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% dHda = -(k.*tmp2.*cos(2*pi.*y))./(tmp2+ 1).^2;
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% dHdb = -(k.*tmp2.*cos(2*pi.*z))./(tmp2+ 1).^2;
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dHdc = -(k.*tmp2)./(tmp2+ 1).^2;
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f=dHdc;
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end
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