我想求得二次曲面模型参数 模型是ζ=A0+A1*X+A2*Y+A3*X^2+A4*Y^2+A5*X*Y 用MATLAB编

你得提供一些数据啊 ,这是我以前的编程,你看看行吗?
>> data=[3603896.338 ,488554.991,8.231
3589780.327 ,487658.722,8.404
3596342.743 ,487810.764,8.332
3599206.341,486605.780,8.252
3593665.841,483924.860,8.266
3590354.599,489991.618,8.442
3588152.720,488971.778,8.439];
X=data(:,1);Y=data(:,2);H=data(:,3);
xx=[ones(length(X),1) X Y X.^2 Y.^2 X.*Y];
[B,BINT,R,RINT] = regress(H,xx)
rcoplot(R,RINT)
Warning:X is rank deficient to within machine precision.
> In regress at 82
B =
0
0.0006
-0.0046
-0.0000
-0.0000
0.0000
BINT =
0 0
-0.0013 0.0026
-0.0187 0.0095
-0.0000 0.0000
-0.0000 0.0000
-0.0000 0.0000
R =
-0.0061
-0.0025
0.0062
0.0046
-0.0017
0.0037
-0.0042
RINT =
-0.0075 -0.0048
-0.0301 0.0252
-0.0192 0.0316
-0.0069 0.0162
-0.0054 0.0020
-0.0122 0.0196
-0.0316 0.0231