曲面拟合问题
实验得到的三维数据，想得到曲面的表达式，请高手指点，谢谢！数据如下：x=2.2:0.1:7;
y=10:5:30;
z=[-2.1067e-005 1.1521e-005 1.084e-006 3.4745e-007 3.0003e-005
-1.7927e-005 9.8679e-006 -1.3982e-006 1.7101e-006 2.8557e-005
-1.4704e-005 8.1705e-006 -3.9088e-006 3.0836e-006 2.7108e-005
-1.1454e-005 6.4594e-006 -6.4081e-006 4.4471e-006 2.5666e-005
-8.2366e-006 4.7654e-006 -8.8568e-006 5.7798e-006 2.4242e-005
-5.1103e-006 3.1193e-006 -1.1215e-005 7.0608e-006 2.2846e-005
-2.1332e-006 1.5518e-006 -1.3444e-005 8.2693e-006 2.1489e-005
6.3633e-007 9.3513e-008 -1.5504e-005 9.3843e-006 2.0182e-005
3.1399e-006 -1.2247e-006 -1.7355e-005 1.0385e-005 1.8935e-005
5.3192e-006 -2.3722e-006 -1.8958e-005 1.1251e-005 1.7758e-005
7.1157e-006 -3.3181e-006 -2.0274e-005 1.196e-005 1.6663e-005
8.4712e-006 -4.0318e-006 -2.1263e-005 1.2493e-005 1.5659e-005
9.3274e-006 -4.4826e-006 -2.1885e-005 1.2828e-005 1.4758e-005
9.6257e-006 -4.6397e-006 -2.2101e-005 1.2944e-005 1.3969e-005
9.6255e-006 -4.6396e-006 -2.21e-005 1.2944e-005 1.3242e-005
9.6238e-006 -4.6387e-006 -2.2096e-005 1.2941e-005 1.2519e-005
9.6194e-006 -4.6364e-006 -2.2086e-005 1.2934e-005 1.1802e-005
9.6107e-006 -4.6318e-006 -2.2065e-005 1.2921e-005 1.109e-005
9.5965e-006 -4.6243e-006 -2.203e-005 1.2899e-005 1.0385e-005
9.5752e-006 -4.6131e-006 -2.1978e-005 1.2867e-005 9.6889e-006
9.5454e-006 -4.5975e-006 -2.1906e-005 1.2821e-005 9.0016e-006
9.5059e-006 -4.5766e-006 -2.181e-005 1.2761e-005 8.3245e-006
9.4551e-006 -4.5499e-006 -2.1687e-005 1.2683e-005 7.6585e-006
9.3917e-006 -4.5165e-006 -2.1533e-005 1.2586e-005 7.0047e-006
9.3143e-006 -4.4758e-006 -2.1345e-005 1.2467e-005 6.3641e-006
9.2214e-006 -4.4269e-006 -2.1119e-005 1.2325e-005 5.7377e-006
9.1116e-006 -4.3691e-006 -2.0853e-005 1.2157e-005 5.1266e-006
8.9836e-006 -4.3017e-006 -2.0542e-005 1.1961e-005 4.5317e-006
8.836e-006 -4.224e-006 -2.0184e-005 1.1735e-005 3.9541e-006
8.6673e-006 -4.1352e-006 -1.9774e-005 1.1477e-005 3.3947e-006
8.4761e-006 -4.0346e-006 -1.931e-005 1.1185e-005 2.8546e-006
8.2611e-006 -3.9214e-006 -1.8788e-005 1.0856e-005 2.3349e-006
8.0207e-006 -3.7949e-006 -1.8205e-005 1.0488e-005 1.8364e-006
7.7538e-006 -3.6544e-006 -1.7557e-005 1.0079e-005 1.3603e-006
7.4587e-006 -3.4991e-006 -1.6841e-005 9.6276e-006 9.076e-007
7.1341e-006 -3.3282e-006 -1.6053e-005 9.1309e-006 4.7923e-007
6.7787e-006 -3.1411e-006 -1.519e-005 8.587e-006 7.6248e-008
6.391e-006 -2.9371e-006 -1.4249e-005 7.9936e-006 -3.0033e-007
5.9696e-006 -2.7152e-006 -1.3226e-005 7.3486e-006 -6.4949e-007
5.513e-006 -2.4749e-006 -1.2117e-005 6.65e-006 -9.7022e-007
5.02e-006 -2.2154e-006 -1.0921e-005 5.8954e-006 -1.2615e-006
4.4891e-006 -1.936e-006 -9.6317e-006 5.0829e-006 -1.5223e-006
3.9189e-006 -1.6358e-006 -8.2474e-006 4.2102e-006 -1.7517e-006
3.3079e-006 -1.3142e-006 -6.7643e-006 3.2752e-006 -1.9485e-006
2.6548e-006 -9.7048e-007 -5.1789e-006 2.2757e-006 -2.1118e-006
1.9582e-006 -6.0381e-007 -3.4879e-006 1.2097e-006 -2.2406e-006
1.2167e-006 -2.135e-007 -1.6879e-006 7.4824e-008 -2.3339e-006
4.2885e-007 2.012e-007 2.2468e-007 -1.1309e-006 -2.3906e-006
-4.0674e-007 6.4102e-007 2.2531e-006 -2.4097e-006 -2.4097e-006];
回复 #1 handb 的帖子
参考帖子：http://forum.vibunion.com/forum/viewthread.php?tid=1005&highlight=%C7%FA%C3%E6%C4%E2%BA%CF
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