我有一组数据，是三维坐标值。x,y,z
x=[ 344.46 349.34 349.27 349.19 349.11 348.94 348.76 348.57 348.36 348.14 347.91 347.67 347.4 347.14 346.85 346.55 346.25 345.93 345.6 345.25 344.9 344.53 344.16 343.77 343.37 342.96 342.54 342.11 341.67 341.22 340.76 340.29 339.82 339.65 339.31 339.57 339.86 340.37 340.87 341.36 341.83 342.28 342.72 343.15 343.57 343.98 344.37 344.74 345.11 345.46 345.79 346.1 346.42 346.72 347 347.27 347.5 347.75 347.97 348.18 348.36 348.54 348.71 348.76 348.16 348.06 347.98 347.9 347.73 347.54 347.33 347.11 346.87 346.62 346.34 346.1 345.8 345.51 345.2 344.88 344.54 344.2 343.83 343.46 343.07 342.69 342.29 341.87 341.44 341 340.55 340.1 339.64 339.17 338.7 338.63 337.91 338.18 338.49 338.75 339.27 339.77 340.26 340.73 341.19 341.64 342.08 342.5 342.89 343.29 343.67 344.04 344.4 344.74 345.06 345.37 345.67 345.94 346.21 346.47 346.69 346.92 347.13 347.32 347.49 ]
y=[ -495.38 -483.24 -483.66 -484.05 -484.5 -485.37 -486.27 -487.14 -488.01 -488.88 -489.74 -490.61 -491.46 -492.32 -493.18 -494.01 -494.85 -495.69 -496.52 -497.36 -498.18 -498.99 -499.81 -500.61 -501.41 -502.21 -503 -503.78 -504.56 -505.33 -506.09 -506.85 -507.61 -507.87 -507.1 -506.66 -506.22 -505.4 -504.56 -503.73 -502.88 -502.04 -501.2 -500.34 -499.49 -498.63 -497.77 -496.9 -496.03 -495.15 -494.26 -493.38 -492.49 -491.59 -490.7 -489.79 -488.9 -487.99 -487.08 -486.17 -485.25 -484.34 -483.41 -483.1 -483.17 -483.58 -484.04 -484.46 -485.36 -486.25 -487.14 -488.01 -488.87 -489.76 -490.58 -491.45 -492.32 -493.17 -494.01 -494.84 -495.67 -496.51 -497.34 -498.16 -498.96 -499.77 -500.57 -501.37 -502.17 -502.95 -503.72 -504.49 -505.25 -506.01 -506.76 -506.86 -506.67 -506.24 -505.79 -505.37 -504.55 -503.73 -502.89 -502.06 -501.22 -500.37 -499.52 -498.66 -497.81 -496.94 -496.08 -495.2 -494.33 -493.44 -492.55 -491.67 -490.77 -489.89 -488.98 -488.08 -487.17 -486.28 -485.36 -484.45 -483.54 ]
z= [ -515.96 -509.36 -509.54 -509.73 -509.92 -510.28 -510.63 -510.99 -511.35 -511.7 -512.06 -512.4 -512.75 -513.1 -513.45 -513.8 -514.13 -514.47 -514.81 -515.15 -515.49 -515.83 -516.16 -516.49 -516.82 -517.14 -517.46 -517.78 -518.1 -518.41 -518.73 -519.03 -519.35 -519.45 -520.23 -520.07 -519.88 -519.54 -519.2 -518.85 -518.51 -518.16 -517.82 -517.47 -517.12 -516.76 -516.41 -516.06 -515.7 -515.35 -514.98 -514.62 -514.26 -513.9 -513.53 -513.16 -512.79 -512.42 -512.05 -511.68 -511.31 -510.93 -510.55 -510.43 -511.55 -511.74 -511.92 -512.09 -512.45 -512.82 -513.18 -513.54 -513.89 -514.25 -514.59 -514.94 -515.29 -515.64 -515.99 -516.33 -516.67 -517 -517.34 -517.68 -518.01 -518.34 -518.66 -518.99 -519.31 -519.64 -519.95 -520.26 -520.58 -520.89 -521.19 -521.23 -522.26 -522.1 -521.89 -521.72 -521.38 -521.04 -520.69 -520.36 -520.02 -519.67 -519.32 -518.96 -518.63 -518.27 -517.92 -517.56 -517.2 -516.84 -516.48 -516.11 -515.75 -515.38 -515.02 -514.65 -514.29 -513.91 -513.54 -513.16 -512.79 ]
能不能直接在matlab上拟合出曲面来啊，要使用哪个函数？


如果不能那么下面的方程

z=a+b*x+c*x^2+d*x^3+e*x^4+f*x^5+g+h*y+i*y^2+j*y^3+k*y^4+l*y^5+m*x*y+n*x^2*y+o*x^3*y+p*x^4*y+q*x*y^4+r*x*y^3+s*x*y^2+t*x^2*y^2+u*x^2*y^3+v*x^3*y^2
能否求出 a b c d e f g h i j k l m n o p q r s t u v 来？这里是已知量为 x y z 的三组数据

我利用for 循环来做可是总是报错，给点意见吧
x=[344.46 349.34 349.27 349.19 349.11 348.94 348.76 348.57 348.36 348.14 347.91 347.67 347.4 347.14 346.85 346.55 346.25 345.93 345.6 345.25 344.9 344.53 344.16 343.77 343.37 342.96 342.54 342.11 341.67 341.22 340.76 340.29 339.82 339.65 339.31 339.57 339.86 340.37 340.87 341.36 341.83 342.28 342.72 343.15 343.57 343.98 344.37 344.74 345.11 345.46 345.79 346.1 346.42 346.72 347 347.27 347.5 347.75 347.97 348.18 348.36 348.54 348.71 348.76 348.16 348.06 347.98 347.9 347.73 347.54 347.33 347.11 346.87 346.62 346.34 346.1 345.8 345.51 345.2 344.88 344.54 344.2 343.83 343.46 343.07 342.69 342.29 341.87 341.44 341 340.55 340.1 339.64 339.17 338.7 338.63 337.91 338.18 338.49 338.75 339.27 339.77 340.26 340.73 341.19 341.64 342.08 342.5 342.89 343.29 343.67 344.04 344.4 344.74 345.06 345.37 345.67 345.94 346.21 346.47 346.69 346.92 347.13 347.32 347.49 347.56
];
y=[-495.38 -483.24 -483.66 -484.05 -484.5 -485.37 -486.27 -487.14 -488.01 -488.88 -489.74 -490.61 -491.46 -492.32 -493.18 -494.01 -494.85 -495.69 -496.52 -497.36 -498.18 -498.99 -499.81 -500.61 -501.41 -502.21 -503 -503.78 -504.56 -505.33 -506.09 -506.85 -507.61 -507.87 -507.1 -506.66 -506.22 -505.4 -504.56 -503.73 -502.88 -502.04 -501.2 -500.34 -499.49 -498.63 -497.77 -496.9 -496.03 -495.15 -494.26 -493.38 -492.49 -491.59 -490.7 -489.79 -488.9 -487.99 -487.08 -486.17 -485.25 -484.34 -483.41 -483.1 -483.17 -483.58 -484.04 -484.46 -485.36 -486.25 -487.14 -488.01 -488.87 -489.76 -490.58 -491.45 -492.32 -493.17 -494.01 -494.84 -495.67 -496.51 -497.34 -498.16 -498.96 -499.77 -500.57 -501.37 -502.17 -502.95 -503.72 -504.49 -505.25 -506.01 -506.76 -506.86 -506.67 -506.24 -505.79 -505.37 -504.55 -503.73 -502.89 -502.06 -501.22 -500.37 -499.52 -498.66 -497.81 -496.94 -496.08 -495.2 -494.33 -493.44 -492.55 -491.67 -490.77 -489.89 -488.98 -488.08 -487.17 -486.28 -485.36 -484.45 -483.54 -483.21
];
z=[-515.96 -509.36 -509.54 -509.73 -509.92 -510.28 -510.63 -510.99 -511.35 -511.7 -512.06 -512.4 -512.75 -513.1 -513.45 -513.8 -514.13 -514.47 -514.81 -515.15 -515.49 -515.83 -516.16 -516.49 -516.82 -517.14 -517.46 -517.78 -518.1 -518.41 -518.73 -519.03 -519.35 -519.45 -520.23 -520.07 -519.88 -519.54 -519.2 -518.85 -518.51 -518.16 -517.82 -517.47 -517.12 -516.76 -516.41 -516.06 -515.7 -515.35 -514.98 -514.62 -514.26 -513.9 -513.53 -513.16 -512.79 -512.42 -512.05 -511.68 -511.31 -510.93 -510.55 -510.43 -511.55 -511.74 -511.92 -512.09 -512.45 -512.82 -513.18 -513.54 -513.89 -514.25 -514.59 -514.94 -515.29 -515.64 -515.99 -516.33 -516.67 -517 -517.34 -517.68 -518.01 -518.34 -518.66 -518.99 -519.31 -519.64 -519.95 -520.26 -520.58 -520.89 -521.19 -521.23 -522.26 -522.1 -521.89 -521.72 -521.38 -521.04 -520.69 -520.36 -520.02 -519.67 -519.32 -518.96 -518.63 -518.27 -517.92 -517.56 -517.2 -516.84 -516.48 -516.11 -515.75 -515.38 -515.02 -514.65 -514.29 -513.91 -513.54 -513.16 -512.79 -512.66
];
syms a b c d e f g h i j k l m n o p q r s t u;
B=[a b c d e f g h i j k l m n o p q r s t u]';
for i=1:126;
A(i)=[1,x(i),x(i)^2,x(i)^3,x(i)^4,x(i)^5,y(i),y(i)^2,y(i)^3,y(i)^4,y(i)^5,x(i)*y(i),x(i)*y(i)^2,x(i)*y(i)^3,x(i)*y(i)^4,x(i)^2*y(i),x(i)^2*y(i)^2,x(i)^2*y(i)^3,x(i)^3*y(i),x(i)^3*y(i)^2,x(i)^4*y(i)];
B=A\z
end;
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.