examp6_5.m

东北大学 薛定谔的高等应用数学问题MATLAB求解的源代码

[x,y,z]=solve('x+3*y^3+2*z^2=1/2','x^2+3*y+z^3=2','x^3+2*z+2*y^2=2/4')

err=[x+3*y.^3+2*z.^2-1/2, x.^2+3*y+z.^3-2, x.^3+2*z+2*y.^2-2/4];
norm(double(eval(err)))

[x,y,z]=solve('x+3*y^3+2*z^2=1/2','x^2+3*y+z^3=2','x^3+2*z*y^2=2/4');
err=[x+3*y.^3+2*z.^2-1/2, x.^2+3*y+z.^3-2, x.^3+2*z.*y.^2-2/4];
norm(double(eval(err)))   % 将解代入求误差